Go toArchive
Browse byFacets
Bookbag ( 0 )
Facet   section ZfN Section B:Volume 049  [X]
Results  283 Items
Sorted by   
Publication Year
1994 (283)
41Author    U. Lf, P. In, Diana Keilhofer3, Dieter SchollmeyerbRequires cookie*
 Title    New Diels-Alder Reactions of (-)-Thebaine and First X-Ray Crystallographic Structure Analyses of the Cycloadducts  
 Abstract    (-)-T h eb a in e, Diels-Alder Reactions, X-Ray Diels-Alder reactions o f (-)-th eb a in e (1) as an electron-rich diene system with acceptor-substituted ethenes gave rise to the cycloadducts 2, 3, and 4 in high regio-and stereoselectivi­ ties. Structural analyses were performed by high resolution N M R spectroscopy and, for the first time in the thebaine cycloadduct series, by X-ray crystallographic structural analyses o f the com pounds 2, 3 a , and 3b. In the reaction o f (-)-th eb a in e (1) with an in situ generated aryne, the anellated azocine derivative 5 was formed. 
  Reference    Z. Naturforsch. 49b, 272 (1994); received October 25 1993 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0272.pdf 
 Identifier    ZNB-1994-49b-0272 
 Volume    49 
42Author    Requires cookie*
 Title    Zum Photoabbau von l-(4-Chlorphenyl)-4,4-dimethyl-3-(lH-l,2,4-triazol- l-y!methyl)-pentan-3-ol (Folicur®) [1]  
  Reference    Z. Naturforsch. 49b, 280 (1994) 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0280.pdf 
 Identifier    ZNB-1994-49b-0280 
 Volume    49 
43Author    H. Bocka, J. M. Eureta, J. W. Bats3, Z. HavlasbRequires cookie*
 Title    Strukturen sterisch überfüllter Moleküle, 39 [1,2] Einkristall-und Gasphasen-Strukturen von l,4-Bis(trimethylsiloxy)benzol Structures of Sterically Overcrowded Molecules 39 [1,2] Single Crystal and Gas Phase Structures o f l,4-Bis(trimethylsiloxy)benzene  
 Abstract    l,4-Bis(trim ethylsiloxy)benzene has been crystallized both by vacuum sublimation and from «-heptane solution, which each yielded colourless plates with identical monoclinic unit cell dim ensions (P 2 Jn, Z = 4). The conform ation o f C[ symmetry shows the two (H 3C)3SiO-substituents to be conrotationally twisted around the 0 -(C 6H4) -0 axis by dihedral angles o f ± 60°. According to the photoelectron spectroscopic ionisation pattern and its K oopm ans' as­ signment, IEV" = -e f MI, by AM 1 eigenvalues, the gas phase structure should also be o f C, symmetry. The results o f geometry-optimized M N D O , A M I or P M 3 calculations for the monosubstituted derivative H 5C6-O S i(C H 3)3 are compared with respect to the quality o f their fit to the measured data. Ausgangspunkt: Molekülkonformationen sterisch überfüllter 1,4-Benzol-Derivate 
  Reference    Z. Naturforsch. 49b, 288—2 (1994); eingegangen am 1. Oktober 1993 
  Published    1994 
  Keywords    Sterically Overcrowded Organosilicon M olecules, Single Crystal Structure, Photoelectron Spectroscopy, Quantum Chemical Calculations 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0288.pdf 
 Identifier    ZNB-1994-49b-0288 
 Volume    49 
44Author    Jürgen Kritzenberger, H. Artm, Ut Yersin, Klaus-Jürgen Range, M. Anfred ZabelRequires cookie*
 Title    Crystal Structure of fran5-Bis(acetonitrile)dich]oroplatinum(II)  
 Abstract    ,1993 Crystal Structure, Absorption Data, frtfns-Bis(acetonitrile)dichloroplatinum(II) We have determined the crystal and molecular structure of fram-bis(acetonitrile)dichlo-roplatinum(II). Crystallographic data for fra/75'-Pt(CH3CN)2Cl2: monoclinic, space group P2j/c, a = 5.0453(9), b = 6.9896(5), c = 11.962(1) k , ß = 101.40(1)°, V = 413.5 A3, Z = 2 ,D X = 2.796 gem-3,^(CuKa) = 377.5 cm'1, R = 0.0502, wR = 0.0529 for 43 variables and 807 reflec­ tions with F > 3 a(F). The Pt atom is in a planar configuration with N and Cl atoms in trans positions. The shortest distance between two Pt atoms corresponds to the length of the crys­ tallographic a-axis (5.045 A). Additionally, we present optical absorption data of the cis-and Jrans-isomer. 
  Reference    Z. Naturforsch. 49b, 297—300 (1994); received July 13 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0297.pdf 
 Identifier    ZNB-1994-49b-0297 
 Volume    49 
45Author    Meyer Zu Köcker, Andreas Behrendt, K. Urt Dehnicke, Dieter FenskeRequires cookie*
 Title    Phosphaniminato-Cluster des  
 Abstract    Kupfers. Synthese und Kristallstrukturen von ICu6Cl6(NPM e3)4|Cl[Me3SiNPM e3| • CH2C12 und ICu6Cl6(NPM e3)4l[Cu(Me3SiNPM e3)2lCl2 Phosphoraneim inato Clusters o f Copper. Syntheses and Crystal Structures of [Cu6Cl6(N PM e3)4]Cl[Me3SiNPM e3] • C H 2C12 and [Cu6Cl6(NPM e3)4][Cu(Me3SiNPM e3)2]Cl2 R olf The title com pounds have been prepared as black-blue crystals with metallic lustre by the reaction o f CuCl2 and CuCl, respectively, with M e3SiN P M e3 in C H 2C12 suspensions. The com ­ plexes have been characterized by cyclic voltammetry and by crystal structure determinations. [Cu6Cl6(N P M e3)4]Cl[M e3SiN P M e3] • C H 2C12: Space group P 2,2,2,, Z = 4, structure solution with 4407 unique observed reflections, R = 0.057. Lattice dimensions at -7 0 °C: a -1159.3(8), b = 2027.1(14), c = 2063.3(12) pm. The compound consists o f cluster ions [Cu6Cl6(N P M e3)4]+, in which the copper atom s form a regular octahedron. Four planes o f the octahedra are capped by //3-nitrogen atom s o f the (N P M e3)~ groups. Each o f the Cu atom s is connected with a terminal chlorine atom . Another chloride ion serves for charge com pensa­ tion; this ion occupies another Cu3 plane o f the octahedron. W ithout bonding interaction one M e3SiN P M e3 molecule and one C H 2C12 molecule are included in the lattice. [Cu6Cl6(N P M e3)4][Cu(M e3SiN P M e3)2]Cl2: Space group Pna2,, Z = 4, structure solution with 5676 unique observed reflections, R = 0.071. Lattice dimensions at -7 0 °C: a = 3117.2(21), b = 1927.4(11), c = 1002.7(8) pm. The compound consists o f cluster ions [Cu6Cl6(N P M e3)4]+, the com plex ion [Cu(M e3SiN PM e3)2]+, and chloride ions. In the cation [Cu(Me3SiN P M e3)2]+ the copper atom is linearly coordinated by the nitrogen atom s o f the phosphaneimine m olecules. 
  Reference    Z. Naturforsch. 49b, 301—3 (1994); eingegangen am 18. November 1993 
  Published    1994 
  Keywords    Phosphoraneim inato Clusters o f Copper, Synthesis, Cyclic Voltammetry, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0301.pdf 
 Identifier    ZNB-1994-49b-0301 
 Volume    49 
46Author    Peter Sartori, Alf Jüschkea, R. Oland Boeseb, Dieter BläserbRequires cookie*
 Title    Synthese und Struktur von 3,3-E)iorganyl-2,4-dioxa-l,5-dithia- l,l,5,5-tetraoxid-3-silacyclohexanen und -heptanen Syntheses and Structure of 3,3-Diorganyl-2,4-dioxa-1,5-dithia-1,1,5,5-tetraoxid- 3-silacyclohexanes and -heptanes  
 Abstract    3.3-D iorganyl-2,4-dioxa-1,5-dithia-1,1,5,5-tetraoxid-3-silacyclohexane, 3,3-Diorganyl-2.4-dioxa-1,5-dithia-1,1,5,5-tetraoxid-3-silacycloheptane, 1 ,/?-Alkanedisulfonic Acid 
  Reference    Z. Naturforsch. 49b, 309 (1994); eingegangen am 20. September 1993 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0309.pdf 
 Identifier    ZNB-1994-49b-0309 
 Volume    49 
47Author    Ulrich Fenner, Hans Pritzkow, W. Alter, Siebert, HerrnRequires cookie*
 Title    Synthese und Komplexierung des 4.5-Cycloocta-2,3-dihydro-l,2,3-trimethyl-l,3-diborols  
 Abstract    Synthesis and Complexation of 4 ,5 -C y c lo o c ta -2 ,3 -d ih y d r o -l,2 ,3 -tr im e th y l-l,3 -d ib o r o le Redox reactions of cyclooctyne and l,l-bis(diiodboryl)ethane lead to 4,5-cycloocta-2,3-dihydro-l,3-diiodo-2-methyl-l,3-diborole (la), which is methylated with AlMe3 to give 4.5-cycloocta-2,3-dihydro-l,2,3-trimethyl-l,3-diborole (lb). Complexation of lb with the complex fragments (C5H5)Co, (C8H12)Ni, (C5H5)Ni, and (OC)3Co leads to the corresponding metal complexes 2 b, 3 b, 4 b, and 5 b. Their constitutions are derived from spectroscopic data and confirmed for 2 b and 4 b by X-ray structure analyses. 2 b contains a C -H -B 3 c /2 e bond, its hydrogen atom could be located. [(C8H12)Ni(lb)] (3 b) is the first example for a (C8H 12)Ni complex having a C -H -B interaction. 2,3-Dihydro-l,3-diborole sind aufgrund ihrer Lewis-Acidität sowie des Donorcharakters der C = C-Doppelbindung hervorragend als Komplex­ liganden geeignet [1]. Dabei fungiert der H etero-cyclus als Vier-und nach Abspaltung des W asser­ stoffatoms an C 2 als D rei-Elektronen-Donor. Eine bifaciale Koordination des 1,3-Diborolyl-Liganden führt zu Zwei-und M ehrkernkomplexen [2, 3] mit Stapelanordnung [4]. Zur Herstellung von 2,3-Dihydro-l,3-diborol-Derivaten haben wir m ehrere Synthesewege entwickelt, wobei Redox-Reaktio-nen zwischen Alkinen und l,l-Bis(diiodboryl)alka-nen die zentrale Rolle bei der Entwicklung dieser Heterocyclen-Chemie spielten. Es zeigte sich, daß der erste Schritt in einer Iodoborierung des Alkins unter Bildung von cis-und frarcs-Addition verläuft. Nur das ds-Produkt ist für die Redox-Reaktion unter Eliminierung von Iod und Bildung einer Bor-Kohlenstoff-Bindung geeignet. Bei Verwendung von Cycloalkinen wie Cyclooctin ist ausschließlich die Bildung von a's-l-Iod-2-boryl-cycloocten zu er­ warten, deshalb sollte die Bildung des Diborols gün­ stig verlaufen. Wir berichten hier über die Synthe­ se des neuen bicyclischen 1,3-Diborols l b und des­ sen Ligandeneigenschaften. * Sonderdruckanforderungen an Prof. Dr. W. Siebert. 
  Reference    Z. Naturforsch. 49b, 315—320 (1994); eingegangen am 15. Oktober 1993 4. 
  Published    1994 
  Keywords    5-Cycloocta-2, 3-dihydro-l, 2, 3-trimethyl-l, 3-diboroles, Cyclopentadienylcobalt, Cyclooctadienenickel, Cyclopentadienylnickel, Tricarbonylcobalt Complexes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0315.pdf 
 Identifier    ZNB-1994-49b-0315 
 Volume    49 
48Author    Joachim Pickardt, Gill-Taik Gong, Dietm Ar RölekeRequires cookie*
 Title    Kristallstruktur des "supramolekularen" Quecksilber(II)chlorid-thiocyanat- Hexamethylentetramin-Addukts Hg(SCN)2« 2 HgCl2* 2 C6H12N4 Crystal Structure of the "Supramolecular" M ercury(II) Chloride Thiocyanate Hexam ethylenetetram ine Adduct Hg(SCN)2-2 HgCl2 -2 C6H 12N4  
 Abstract    Hexamethylenetetramine Complexes, Mercury(II) Chloride Thiocyanate Adduct, Crystal Structure Crystals of the adduct Hg(SCN)2-2 HgCl2-2 C6H12N4 were obtained from an aqueous solu­ tion containing 0.1 mol/1 hexamethylenetetramine and 0.05 mol/1 potassium thiocyanate and mercury(II) chloride. The compound crystallizes monoclinically; space group P2xln, a = 767.3(4), b = 1854.7(7), c = 872.5(7) pm, and ß = 101.48(5)°. The structure consists of a net­ work of chains -C l-H g -C l-H g -and -(C l-H g -)2N C S -H g-S C N -(H g-C l)2-which share common Hg atoms and form distorted hexagonal and trigonal channels. The hexa­ methylenetetramine molecules lie in the hexagonal channels. They act as/ij bridging ligands, forming bonds to two Hg atoms in a given layer, and an additional bond to a Hg atom a neigh­ bouring layer. 
  Reference    Z. Naturforsch. 49b, 321—324 (1994); eingegangen am 18. November 1993 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0321.pdf 
 Identifier    ZNB-1994-49b-0321 
 Volume    49 
49Author    Mit Unterschiedlich, Koordinierten Zinkionen, Joachim Pickardt, Gill-Taik Gong, Sabine Wischnack, Christina SteinkopffRequires cookie*
 Title    Kristallstruktur zweier Zinkthiocyanat-Hexamethylentetramin-Addukte, Zn(SCN)2» (Q H ^N,), und {Zn(SCN)2 C6HnN4 2H 20}(SCN)2-(C6H 12N4)2, and {Zn(SCN)2-C6H 12N4-2H 20}", with Differently Coordinated Zinc Ions  
 Abstract    of the adducts Zn(SCN),-(C6H12N4)2 (1), and {Zn(SCN)2-C6H 12N4-2H20}" (2) were obtained by crystallization from aqueous solutions containing hexamethylenetetrami­ ne, potassium thiocyanate and zinc nitrate or zinc sulfate, resp., under identical conditions, as two totally different products. 1 crystallizes orthorhombically, space group P nmm, Z -2, a -622.4(5), b -1152.3(7), c = 1394.0(9) pm; 2 is monoclinic, space group C2/c, a = 984.4(3), b = 1217.0(5), c = 1257.4(6) pm, andß = 111.69(5)°. The crystal structure of 1 contains discrete molecules of the complex, in which the zinc ion is tetrahedrally coordinated by two NCS li­ gands, and two hexamethylenetetramine molecules, which act as monodentate ligands. In 2 however, the zinc ions are octahedrally coordinated. A "supramolecular" structure is form­ ed: The hexamethylenetetramine molecules act as bridging bidentate ligands and connect [Zn(H20) 2(NCS)2] units forming zig-zag chains. Adjacent chains are interconnected via hydrogen bonds. The formation of the two compounds with different coordination may be due to the fact, that the educts Zn(N03)2-4H20 and ZnS04-7H20 contain Zn(H20) 4 and Zn(H20) 6 moieties, resp., and that these species are retained in solution. 
  Reference    Z. Naturforsch. 49b, 325—329 (1994); eingegangen am 24. August 1993 
  Published    1994 
  Keywords    Hexamethylenetetramine Complexes, Zinc Thiocyanate Adducts, Crystal Structure Crystals 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0325.pdf 
 Identifier    ZNB-1994-49b-0325 
 Volume    49 
50Author    Requires cookie*
 Title    Einkernige Ruthenium(III)-Komplexe des Typs LRuX3 (X = Cl  
  Reference    Z. Naturforsch. 49b, 330 (1994) 
  Published    1994 
  Keywords    NCO-, NCS", Nj; L = l, 4, 7-Trimethyl-l, 4, 7-triazacyclononan) 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0330.pdf 
 Identifier    ZNB-1994-49b-0330 
 Volume    49 
51Author    Sebastian Bommers, H. Ubert SchmidbaurRequires cookie*
 Title    Poly(trifluoromethanesulfonatosilyl)methanes - Precursors to Polysilylmethanes  
 Abstract    Poly(silyl)m ethanes, Silanes, Trifluoromethanesulfonates A new and efficient synthetic route to di-and tri(silyl)methane is presented. Starting from bis-and tris(phenylsilyl)methane, bis-and tris(trifluoromethanesulfonatosilyl)methane can be obtained by S i-P h cleavage with equivalent quantities o f trifluorom ethanesulfonic acid (tri­ flic acid). Their reduction with lithium aluminium hydride yields di-and tri(silyl)methane. Substitution o f the previously employed liquid anhydrous hydrogen bromide by triflic acid thus offers an experimentally more simple alternative with shorter reaction times and high selectivity. 
  Reference    Z. Naturforsch. 49b, 337 (1994); received December 14 1993 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0337.pdf 
 Identifier    ZNB-1994-49b-0337 
 Volume    49 
52Author    Thom As Schleid, Falk LissnerRequires cookie*
 Title    Oxidsulfidchloride der Lanthanide vom Typ M 4OS4Cl2 (M = L a-N d ) M 4OS4Cl2-Type Oxysulfide Chlorides of the Lanthanides (M = L a -N d )  
 Abstract    Oxysulfide chlorides, M4OS4Cl2, o f the lanthanides (M = L a -N d) are obtained upon the oxi­ dation o f the metals with sulfur in the presence o f MOC1 (or M 20 3) and MC13 in appropriate molar ratios. Additional NaCl or an excess o f MC13 serving as a flux provide even single crys­ talline material after reactions at 850 °C for seven days in sealed tantalum capsules. The crys­ tal structure o f M4OS4Cl2 (hexagonal, P 6 3mc, no. 186, Z = 2; M = La: a = 933.19(3), c = 701.22(4) pm, c/a = 0.7514, R = RH = 0.020; M = Ce: a = 925.49(3), c = 694.13(3) pm, c/a = 0.7500; M = Pr: a = 919.72(4), c = 688.53(4) pm, c/a = 0.7486; M = Nd: a = 914.25(4), c = 683.12(4) pm, c/a = 0.7472, R = 0.022, Rw = 0.019) contains isolated 0 2--centered (M 3+)4 te-trahedra which are surrounded by twelve S2-and six Cl-, capping vertices, edges, and faces o f each tetrahedron and linking to other [OM4] units. Basically, the structure is identical to that o f Ba4OCl6 if Ba2+ is substituted by M 3+ and 2/3 o f the CL anions are replaced by S2-to secure charge neutrality in M4OS4Cl2. Different models for the C L /S 2-replacement are presented on the basis o f comparisons o f the Madelung part o f the lattice energy (M A PLE) with the M APLE sum o f the binaries (M 20 3, M 2S3, and MC13). 
  Reference    Z. Naturforsch. 49b, 340 (1994); eingegangen am 27. September 1993 
  Published    1994 
  Keywords    Lanthanides, Oxysulfide Chlorides, Synthesis, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0340.pdf 
 Identifier    ZNB-1994-49b-0340 
 Volume    49 
53Author    Hans-Ulrich Hummel, Petra Joeg, Gerhard Pezzei, Alexander WolskiRequires cookie*
 Title    Die Kristallstruktur von Gadolinium-(III)-hydrogensulfat G d(H S04)3 Crystal Structure of Gadolinium-(III)-hydrogensulfate G d (H S 0 4)3  
 Abstract    Gadolinium-(III)-hydrogensulfate, Preparation, Crystal Structure G d (H S 0 4)3 is obtained on treatment o f G d2(S 0 4)3 in conc. H2S 0 4 in closed vessels at 200 °C. The extremely moisture-sensitive crystals belong to the orthorhom bic space group Pbca. Lattice constants are a = 12.080(8), b = 9.574(8), c = 16.513(8)Ä and Z = 8. Gadolinium is coordinated by eight oxygen atoms o f the hydrogensulfate ligands forming a distorted square antiprism. There are three different H S 0 4" anions within the structure. One o f them is coordinated with two Gd atom s while two H S 0 4" anions bridge three Gd atom s. The G d -O bond lengths vary in the range o f 2 .3 3 4(6)-2.423(5)Ä . 
  Reference    Z. Naturforsch. 49b, 347 (1994); eingegangen am 23. September 1993 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0347.pdf 
 Identifier    ZNB-1994-49b-0347 
 Volume    49 
54Author    Holger Szillat, Hanskarl Müller-BuschbaumRequires cookie*
 Title    Synthese und Kristallstruktur von KCuHo2Mo40 16 Synthesis and Crystal Structure of K C uH o2M o40 I6  
 Abstract    Single crystals o f K C uH o2M o40 16 have been prepared by recrystallisation from melts and investigated by X-ray diffractometer techniques. The compound crystallizes with m onoclinic symmetry, space group C 2/c, a = 521.6(1), b = 1251.3(2), c = 1953.1(2) pm, ß = 92.903(18)°, Z -4. K C uH o2M o40 16 represents a new structure type characterized by H oO s and alternate CuO6/K O 10 polyhedra chains. The connection o f these polyhedra chains to each other and by M o 0 4 tetrahedra is described and the crystal structure discussed with respect to related com ­ pounds o f the C uLnM o2Os and K L nM o20 8 types. 
  Reference    Z. Naturforsch. 49b, 350 (1994); eingegangen am 10. Dezember 1993 
  Published    1994 
  Keywords    Crystal Structure, Copper, H olm ium, M olybdenum, Potassium 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0350.pdf 
 Identifier    ZNB-1994-49b-0350 
 Volume    49 
55Author    F.-D Martin, H. Müller-BuschbaumRequires cookie*
 Title    Synthese und Kristallstruktur eines Alkali-Erdalkali-Kupfer-Halogeno-Oxovanadats: KBaCuV20 7Cl Synthesis and Crystal Structure of an Alkaline Alkaline-Earth Halide Oxide of Copper and Vanadium: KBaCuV20 7Cl  
 Abstract    Potassium, Barium, Copper, Vanadium Chloride Single crystals of KBaCuV20 7Cl have been prepared by a flux technique and investigated by X-ray analysis. The compound crystallizes with tetragonal symmetry, space group C^v-P 4 bm, a = 8.8581, c = 5.4711 Ä, Z = 2. The crystal structure shows Cu2+ within a one sided strongly distorted C u04Cl2 octahedron. The copper ion is shifted towards the nearer Ch neigh­ bour to form a C u04Cl square pyramid. Two V 0 4 tetrahedra are connected to give stretched V2Oy double tetrahedra, and linked in planes via the oxygen corners of the C u04Cl pyramids. The crystal structure and the structure of the complex B a08Cl2 polyhedron are discussed. 
  Reference    Z. Naturforsch. 49b, 355—359 (1994); eingegangen am 1. Dezember 1993 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0355.pdf 
 Identifier    ZNB-1994-49b-0355 
 Volume    49 
56Author    Frank Weller, Fritjof Schmock, Kurt Dehnicke, Kurt Findeisen Bayer-WerkRequires cookie*
 Title    Synthese, IR-Spektrum und Kristallstruktur von 1.3.5-Trichlortriazinium-hexachloroantimonat, [HC3N3C13]SbCl6 Synthesis, IR Spectrum and Crystal Structure of 1.3.5-Trichlortriazinium Hexachloroantim onate, [HC3N3Cl3]SbCl6  
 Abstract    ,3,5-Trichlortriazinium hexachloroantimonate has been prepared by the reaction of CCl2 = N-COCl with antimony pentachloride in boiling dichloromethane. The compound was characterized by IR spectroscopy and by a crystal structure determination. [HC3N3Cl3]SbCl6 crystallizes in the monoclinic space group P 2 Jn with four formula units per unit cell. 2503 observed unique reflections, R = 0.029. Lattice dimensions at 19 °C: a = 1314.1(1), b = 958.2(1), c = 1329.1(1) pm, ß = 117.113(5)°). The compound forms ion pairs via a linear N -H • • • Cl bridge, thus distorting the SbCl6~ ion from octahedral geometry. The C3N3 skeleton of the [HC3N3C13]+ ion is nearly planar, but the hydrogen atom lies about 30 pm out of this plane. 
  Reference    Z. Naturforsch. 49b, 360—364 (1994); eingegangen am 3. November 1993 1.3. 
  Published    1994 
  Keywords    5-Trichlortriazinium Salt, Synthesis, IR Spectra, Crystal Structure 1 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0360.pdf 
 Identifier    ZNB-1994-49b-0360 
 Volume    49 
57Author    Ayhan Elmalia, Yalcin Elermana+, Ingrid Svobodab, H. Artm, Ut Fuessb, Klaus Griesarc, W. Olfgang HaasecRequires cookie*
 Title    Structures and Magnetic Properties of Dinuclear Iron(III) Complexes  
 Abstract    , 1993 X-Ray, Dinuclear Iron (III) Complex, Magnetic Properties, Antiferromagnetic Coupling The compounds [FeL'(MeOH)Cl]2 (1), [FeL2Cl]2 (2) and [FeL3Cl]2 (3), with L1 for N-2-hy-droxy-4-chlorophenylsalicylaldimin, L2 for N-2-hydroxyphenyl-3-hydroxy-2-naphthaldimin, and L3 for N-2-hydroxy-4-chlorophenyl-3-hydroxy-2-naphthaldimin, have been synthesized. 1 crystallizes in the monoclinic system, space group P2,/c. The lattice parameters are a = 7.347(1), b = 21.390(1), c = 9.555(2)A,ß= 104.92(1)° with Z = 2. The crystal structures of 2 and 3 were reported previously. In all structures, two identical [FeL] fragments, related by an inversion center, are connected by two bridging oxygen atoms to form a binuclear unit in the supported condition. Magnetic susceptibility measurements in the range 4.2 < T < 286.5 K re­ vealed the diiron (III) centers of 1, 2, and 3 to be weakly antiferromagnetically coupled with spin exchange coupling constants 7, = -7.7(1) cm '1, J2 = -6.5(1) cm '1, and J3 = -10.9(1) cm-1, respectively. 
  Reference    Z. Naturforsch. 49b, 365—369 (1994); received October 29 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0365.pdf 
 Identifier    ZNB-1994-49b-0365 
 Volume    49 
58Author    I. B. Iii, Sonderdruckanforderungen An, ProfR. Dr, KösterRequires cookie*
 Title    3 K > = € Na B a n  
  Reference    Z. Naturforsch. 49b, 370 (1994) 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0370.pdf 
 Identifier    ZNB-1994-49b-0370 
 Volume    49 
59Author    RolandK. Öster3, G. Ünter Seidel3, Dieter Bläserb, Roland BoesebRequires cookie*
 Title    Dimere 9-Hydrochalkogeno-9-BBN-Verbindungen - Bildung und Kristallstruktur [1] Dimeric Hydrochalcogeno-9-BBN Compounds - Form ation and Crystal Structure [1]  
 Abstract    Boron, Sulfur, Selenium, 9-BBN Compounds The trans-dimer of (9-HS-9-BBN)2 (1)2, obtained from H2S with (9H-9-BBN)2 or with (9-BBN)2S, crystallizes in the monoclinic space group C2/m [lattice constants (at 120 K): a = 15.279(2), b = 15.909(3), c = 6.822(4) Ä; ß = 91.05(4)°] with a planar B2S2ring. The cü-dimer of (9-HSe-9-BBN)2 (2)2, obtained from (9-BBN)2Se with aniline, crystallizes in the monoclinic space group P2tIn [lattice constants (at 225 K): a = 6.892(1), b= 20.623(3), c -12.226(2) Ä; ß = 97.28°] with an folded B2Se2ring. 
  Reference    Z. Naturforsch. 49b, 377—382 (1994); eingegangen am 4. Oktober 1993 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0377.pdf 
 Identifier    ZNB-1994-49b-0377 
 Volume    49 
60Author    CorneliusG. Kreiter, WolfgangC. OnradRequires cookie*
 Title    Gehinderte Ligandbewegungen in Übergangsmetallkomplexen, XLIII [1]: Photoreaktionen von Hexacarbonyl-zi-i/^-fulvalen-dimolybdän und -diwolfram mit konjugierten Cyclodienen Hindered Ligand M ovements in Transition Metal Complexes, XLIII [1]: Photoreactions of Hexacarbonyl-//-^/5:5-fulvalene-dimolybdenum and -ditungsten with Conjugated Cyclodienes  
 Abstract    Fulvalene Bridged Cyclodiene Complexes, Inversion Hexacarbonyl-/z-775:5-fulvalene-dimolybdenum (1) reacts photochemically with 1,3-cyclo-pentadiene (a), and 1,3-cyclohexadiene (b) to yield the corresponding tetracarbonyl-^4-l,3-cy-clodiene-/i-/75:5-fulvalene-dimolybdenum complexes 4a, 4b. With a also mixed valent tricar-bonyl-/75-cyclopentadienyl-//-//5:5-fulvalene-hydrido-dimolybdenum (3) is formed. Hexacar-bonyl-//-//3:5-fulvalene-ditungsten (2) yields with a only tricarbonyl-^-',-cyclopentadienyl-/i-?/5:5-fulvalene-hydrido-ditungsten (5). The ^4-l,3-cyclodiene ligands in 4a, 4b are u-oriented towards fulvalene. The complexes 4a, 4b show hindered inversions with energy barriers of AG?n, = 59.9 ± 2 kJ/mol (4a) and A G t, = 62.7 ± 2 kJ/mol (4b). 
  Reference    Z. Naturforsch. 49b, 383 (1994); eingegangen am 5. November 1993 
  Published    1994 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0383.pdf 
 Identifier    ZNB-1994-49b-0383 
 Volume    49 
Prev
1
2
3
4
5
...
Next