Go toArchive
Browse byFacets
Bookbag ( 0 )
'2' in keywords Facet   section ZfN Section B  [X]
Results  99 Items
Sorted by   
Publication Year
2001 (1)
2000 (3)
1999 (6)
1998 (3)
1997 (7)
1996 (8)
1995 (2)
1994 (6)
1993 (1)
1992 (3)
41Author    ProfG. Dr, MlostonRequires cookie*
 Title    Metallkomplexe  
 Abstract    mit funktionalisierten Schwefelliganden, XV [1]. Reaktionen von Platin(0)-Komplexen mit 1,2,4-Trithiolanen, 1,2,4,5-Tetrathianen, 1,2,3,5,6-Pentathiepanen sowie Thioketonen. Kristallstrukturanalyse von (Ph3P)2Pt(772-Ph2C=S) M etal Com plexes o f Functionalized Sulfur C ontaining Ligands, XV [1]. Reactions of Platinum(O) Com plexes w ith 1,2,4-Trithiolanes, 1,2,4,5-Tetrathianes, 1,2,3,5,6-Penta-thiepanes as well as Thioketones. X -R ay Structure A nalysis o f (Ph3P)2Pt(/72-Ph2C=S) W olfgang W eigand2, R alf W ünsch3, C hristian R obl3, Grzegorz M lostonb, Heinrich N öthc und M anfred Schm idt0 3,3,5,5-Tetraphenyl-1,2,4-trithiolane (1) reacts with twofold excess of (Ph3P)2Pt(?/2-C2H4) (4) to give a 1:1 mixture of the complexes (Ph3P)2Pt (SCPh2S) (6a) and (Ph3P)2Pt(?/2-Ph2C=S) (7a). Treatment of 3,3,6,6-tetraphenyl-l,2,4,5-tetrathiane (2) with a fourfold excess of 4 yields [Pt2(PPh3)4(/j-S)2] (8) and the platinum(O) compound 7a. The reaction of the 1,2,3,5,6-pentathiepane 3 with a fourfold excess of 4 affords a 1:1:1 mixture of 8, the platinum(O) complex 7b and the bis-thiolato platinum(II) complex 6b. The thioketone complexes 7a-c were formed in smooth reactions of 4 with the thioketones 5a-c. The molecular structure of (Ph3P)2Pt(?/2-Ph2C=S) (7a) has been established by single-crystal X-ray analysis. 
  Reference    Z. Naturforsch. 55b, 453—458 (2000); eingegangen am 28. Februar 2000 
  Published    2000 
  Keywords    1, 2, 4-Trithiolanes, Thioketones, Platinum Complexes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0453.pdf 
 Identifier    ZNB-2000-55b-0453 
 Volume    55 
42Author    Florian Breitsameter, Peter Mayer, Alfred SchmidpeterRequires cookie*
 Title    Die Kondensation von Ylidylchlorphosphanen mit Phosphanen und Bis(diphenylphosphanyl)methan und -amin The Condensation o f Ylidyl Chlorophosphines with Phosphines and Bis(diphenylphosphino)methane and -amine  
 Abstract    Ylidyl chlorophosphanes 1 and dichlorophosphanes 2 react with trimethylsilyl phosphanes to yield the ylidyl diphosphanes 3, 4,5, 7 and the 2-ylidyl triphosphanes 8. From the reaction of compounds 1 with lithium diphosphanyl amide and diphosphanyl methanide result the ylidyl diphosphonium ylides 11 and ylidyl diphosphinimines 13. The former rearrange to give the ylidyl triphosphanyl methanes 12. The chloromethyl diphosphinimine 13c enters a cyclization to give the 1,2,3,5-azatriphosphole derivative 14, the structure of which has been solved by X-ray analysis. From the reaction of ylidyl bis(chlorophosphanes) 17 and 20 with the same reagents the 1,2,4,5-tetraphosphinine derivative 18 and the 1,2,3,5,6-azatetraphosphinine derivatives 19 and 21 are obtained. 
  Reference    Z. Naturforsch. 55b, 519—526 (2000); eingegangen am 21. Februar 2000 
  Published    2000 
  Keywords    Phosphonium Ylides, Diphosphanes, 1, 2, 3, 5-Azatriphospholes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0519.pdf 
 Identifier    ZNB-2000-55b-0519 
 Volume    55 
43Author    W. L. Driessen, P.L A EverstijnRequires cookie*
 Title    Metal(II) Complexes of 1,2,5-Oxadiazole  
 Abstract    A series of new coordination compounds is reported with 1,2,5-oxadiazole (ODZ) as the ligand, viz. [M(ODZ)3](SbCl 6)2 with M = Mg(II), Mn(U), Fe(II), Co(II), Ni(II), and Zn(II). The metal ions are in a regular octahedral environment of six nitrogen atoms. The ligands function as bidentate bridges between the metal ions. 
  Reference    Z. Naturforsch. 33b, 1120—1123 (1978); received June 12 1978 
  Published    1978 
  Keywords    Transition Metal Ions, 1, 2, 5-Oxadiazole, Ligand Field Spectra, IR 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1120.pdf 
 Identifier    ZNB-1978-33b-1120 
 Volume    33 
44Author    Ger Vos, AnthonieJ. De Kok, GerritC. VerschoorRequires cookie*
 Title    Complexes of 1,2,4-Triazoles, Part XVII The Crystal Structure of Tris-/«-(4-ethyl-l,2,4-triazole-N l ,N 2 )- (4-ethyl-l,2,4-triazole-N 1 )-aquo-bis [bis(thiocyanato-N)- nickel(II)]hydrate, Ni2(C4N3H7)4(H20)(NCS)4 *H20 (x ~ 2.5)  
 Abstract    The crystal structure of Ni2(C4N3H7)4(H20)(NCS)4 • 2.5 H20 has been determined by X-ray diffraction techniques. The compound crystallizes in the monoclinic space group P2i/n with a — 15.121(4), 6= 13.237(2), c= 18.069(3), ß = 94.71(2)° and Z = 4; R = 0.040 (Rm = 0.051). The compound consists of dimeric units in which two Ni ions are bridged by three ethyltriazole (Ettrz) groups. For one Ni, two N donating NCS" groups and an Ettrz coordinating by only one N atom complete the NiNe octahedron. The other Ni atom, which is also octahedrally coordinated, has a coordinated water molecule instead of a monodentate Ettrz. 
  Reference    Z. Naturforsch. 36b, 809—813 (1981); received April 2 1981 
  Published    1981 
  Keywords    4-Ethyl-l, 2, 4-triazole, Binuclear Compound, Hydrogen Bonding 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0809.pdf 
 Identifier    ZNB-1981-36b-0809 
 Volume    36 
45Author    Herbert Meier, Johannes Zountsas, Oswald ZimmerRequires cookie*
 Title      
 Abstract    A X H and 13 C NMR spectroscopical study is performed on the basis of 37 1,2,3-selena-diazoles. Besides the discussion of chemical shifts and coupling constants of X H and 13 C, selenium satellites were measured providing 1 H 77 Se and 13 C 77 Se coupling constants. 
  Reference    Z. Naturforsch. 36b, 1017—1022 (1981); eingegangen am 16. April 1981 
  Published    1981 
  Keywords    NMR Spectra, 1, 2, 3-Selenadiazoles, 77 Se Coupling 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1017.pdf 
 Identifier    ZNB-1981-36b-1017 
 Volume    36 
46Author    Udo Plücken, Herbert MeierRequires cookie*
 Title    Lanthanide Induced Shifts in the »H and 13 C Nuclear Magnetic Resonance Spectroscopy for Structure Elucidations of Thiadiazole Oxides  
 Abstract    A systematic investigation of the LIS-method for structure elucidations is performed on the basis of thermally generated monoxides of 1,2,3-thiadiazoles. A calculation process for the evaluation of lanthanide induced shifts according to the McConnell-Robertson equa-tion was developed. The program can be applied to underdetermined systems with fewer variables than chemically not equivalent X H plus 13 C nuclei. A quality criterium for the method is given by 4-phenyl-l,2,3-thiadiazole-3-oxid -wellknown by an X-ray analysis. 
  Reference    Z. Naturforsch. 36b, 1305—1314 (1981); eingegangen am 21. Aprü 1981 
  Published    1981 
  Keywords    1, 2, 3-Thiadiazole-oxides, LIS Measurements, LIS Computer Program 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1305.pdf 
 Identifier    ZNB-1981-36b-1305 
 Volume    36 
47Author    M. Torres, A. Clement, 0. P. StrauszRequires cookie*
 Title    Argon-Matrix Isolation of Bis(carbomethoxy)thiirene: Formation of Acyl and Carbalkoxythioketenes  
 Abstract    Photolysis of argon-matrix isolated 4,5-bis(carbomethoxy)-l,2,3-thiadiazole with A = 254 or 265 nm resulted in the almost quantitative formation of bis(carbomethoxy)-thiirene (3g). Photolysis of 3g could only be carried out by long irradiation times at short wavelength A = 210nm and resulted mainly in extensive fragmentation instead of the formation of bis(carbomethoxy)thioketene, confirming earlier predictions that substituents, especially electron-withdrawing ones, should stabilize the thiirene ring. Methylcarboethoxy and methylacetylthioketene were obtained, however, in the argon-matrix photolysis or flow thermolysis of 4-methyl-5-carboethoxy-or 4-carboethoxy-5-methyl-l,2,3-thiadiazole and 4-acetyl-5-methyl-l,2,3-thiadiazole, respectively. 
  Reference    Z. Naturforsch. 38b, 1208—1212 (1983); received June 6 1983 
  Published    1983 
  Keywords    Thiirene, Thioketene, 1, 2, 3-Thiadiazole, Thio-Wolff Rearrangement 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1208.pdf 
 Identifier    ZNB-1983-38b-1208 
 Volume    38 
48Author    Wim Vreugdenhil, MarcelF J Schoondergang, JaapG. Haasnoot, Jan ReedijkRequires cookie*
 Title    Magnetic and Spectroscopic Properties of Metal(II) Thiocyanate Compounds with 3,4-Dialkyl Substituted 1,2,4-TriazoIes  
 Abstract    Syntheses, spectroscopic and magnetic properties are described of a series of metal(II) thio-cyanate compounds with the asymmetric ligands 3-methyl-4-ethyl-l,2,4-triazole and 3-methyl-4-;-butyl-l,2,4-triazole. A dinuclear structure is proposed for the manganese, cobalt and nickel compounds based on the magnetic behaviour as well as on spectroscopic and analytical data. These compounds show antiferromagnetic interaction in the temperature range 4—80 K. The zinc compounds appear to be mononuclear, whereas a chain-like structure is proposed for the cad-mium compounds. 
  Reference    Z. Naturforsch. 42b, 791—795 (1987); received January 19 1987 
  Published    1987 
  Keywords    Asymmetric 1, 2, 4-Triazoles, Magnetic Exchange, Binuclear Compounds, Thiocyanate 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0791.pdf 
 Identifier    ZNB-1987-42b-0791 
 Volume    42 
49Author    Requires cookie*
 Title    Darstellung und Kristallstruktur von 2  
  Reference    (Z. Naturforsch. 47b, 1 [1992]) 
  Published    1992 
  Keywords    4, 6-Triferrocenyl-1, 3, 5, 2, 4, 6-triselenatriborinan 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0001.pdf 
 Identifier    ZNB-1992-47b-0001 
 Volume    47 
50Author    MichaelW. Zenke, Karl HensenRequires cookie*
 Title    Phasendiagramme und Exzeßvolumina der Systeme (CH^SiCK/Pvridin und (CH3)2CC12/Pyridin  
 Abstract    The isobaric melting and boiling diagrams for the systems: dimethyldichlorosilane/pyridine and 2,2-dichloropropane/pyridine are reproduced. The existence of the incongruently melting addition compounds (CH3)2SiCl2 (Pyridine)2 and [(CH3)2CC12]3 • Pyridine could be proved. Some measurements of the molar volume of mixtures of pyridine and dimethyldichlorosilane, and pyridine and 2,2-dichloropropane are reported. For both systems the molar excess vol­ ume has been calculated as a function of the mole fractions. 
  Reference    Z. Naturforsch. 49b, 412—416 (1994); eingegangen am 20. September 1993 
  Published    1994 
  Keywords    Phase Diagrams, Pyridine, Dimethyldichlorosilane, 2, 2-Dichloropropane, Excess Volumes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0412.pdf 
 Identifier    ZNB-1994-49b-0412 
 Volume    49 
51Author    E. K. Yudin, K. V. Domasevitch, E. B. RusanovRequires cookie*
 Title    Crystal and Molecular Structure of Isonitrosomalonodiamido- (2,2-dipyridyl)copper(II), Chloride Monohydrate [Cu(Dipy){ONC(CONH2)2}Cl] H20  
 Abstract    The crystal and molecular structure of the complex [Cu(Dipy){NDA}Cl] • H 20 , where (NDA) = {ONC(CONH2)2}~ anion (space group P I, triclinic, with a = 7.834(1), b = 9.923(1), c = 9.952(1)A, a = 93.60(1), ß = 93.65(1), y = 92.72(1)°, Z = 2) has been determined from X-ray diffraction data. The structure was refined to R -0.029 for 2243 reflections with I>3ct(I). The coordination polyhedron of Cu2+ can be described as a distorted square pyra­ mid with a chlorine atom in the apex, and with the central atom situated 0.258(3) A above the base of the pyramid towards the chlorine atom. The complicated system of hydrogen bonding involving the water of crystallization connects copper complex units in to the chains in the c direction. 
  Reference    Z. Naturforsch. 50b, 864—866 (1995); received O ctober 17 1994 
  Published    1995 
  Keywords    Copper(II), Oximes, 2, 2-Dipyridyl, X-Ray Spectra 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0864.pdf 
 Identifier    ZNB-1995-50b-0864 
 Volume    50 
52Author    Z. NaturforschRequires cookie*
 Title    Synthese und Dimerisierungsverhalten des l,l-Bis(trimethylsilyl)-2-(2,5-diisopropylphenyl)silens  
 Abstract    Tris(trim ethylsilyl)silylmagnesium bromide, (Me^SiX^SiMgBr, reacts with 2.5-diisopropyl-benzaldehyde to give 2,5-diisopropylphenyl-tris(trimethylsilyl)silylmethanol (1). With sodium 
  Reference    Z. Naturforsch. 51b, 370—3 (1996); eingegangen am 21. August 1995 
  Published    1996 
  Keywords    Silenes, Silene Dimerization, 2, 3-Disilanaphthalenes Tetrahydro, 1, 2-Disilacyclobutanes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0370.pdf 
 Identifier    ZNB-1996-51b-0370 
 Volume    51 
53Author    JosephG. Robe, Duc Le Van, JostW. Innemöller, Bernt Krebs, M. Echtild LägeRequires cookie*
 Title    Reaktive E=C(p-p)7r-Systeme, XLIII [1] Darstellung und Charakterisierung P-Phosphino-oder P-Arsino-substituierter Fluorphosphaalkene des Typs R2E-P=C(F)NEt2 (R = Me, CF3, Me2N; E = P, As)  
 Abstract    Reactive E=C(p-p)-7r System s XLIII [1] Synthesis and Characterization o f P -Phosphino or P-A rsino Substituted Fluoro-phosphaalkenes of the Type R 2E -P=C (F)N Et2 (R = Me, C F 3, M e7N; E = R As) The easily accessible phosphaalkene HP=C(F)NEt2 (lb) reacts with halophosphanes or -arsanes R2EX (X = Cl, I) in the presence of NEt3 to give P-phosphino-or -P-arsino sub­ stituted fluorophosphaalkenes of the type RiE-P=C(F)NEti (2 -6) in high yields (60 -85 %) [R2E: (CF3)2P (2), Me2N(CF3)P (3), Me2P (4), (CF3)2As (5), M e2As (6)]. The analogous re-action of ib with CF3PI2 (molar ratio 1:2) unexpectedly leads to the triphosphetene Et2N 
  Reference    Z. Naturforsch. 51b, 778—784 (1996); eingegangen am 30. November 1995 
  Published    1996 
  Keywords    Phosphaalkenes, 1, 2, 3-Triphosphetenes, NMR Spectra, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0778.pdf 
 Identifier    ZNB-1996-51b-0778 
 Volume    51 
54Author    Clemens Krempner1, Rhett Kempeb, Hartmut Oehme3Requires cookie*
 Title    The Thermal Isomerization of a Tetrahydro-2,3-disilanaphthalene into a 1,2-Disilacyclobutane -The Conversion of a Formal Silene [2+4] Cyclodimer into the [2+2] Cycloadduct  
 Abstract    1,2,3,8a-Tetrahydro-1 -mesityl-5,7,8a-trimethyl-2,2,3,3-tetrakis(trimethylsilyl)-2,3-disila-naphthalene (3), the formal [2+4] cyclodimer of the transient 2-mesityl-l,l-bis(trimethylsilyl)-silene (2), on thermal treatment gradually isomerizes to give a mixture of the [2+2] products (E)-and -predominantly -(Z)-3,4-dimesityl-1,1,2,2-tetrakis(trimethylsilyl)-l,2-disilacyclo-butane [(E/Z)-4], By prolonged heating or at higher temperatures both (E/Z)-3 and (Z)-4 are converted into (E)-4, the thermodynamically most stable head-to-head dimer of 2. Possible pathways of the isomerization processes are discussed. 
  Reference    Z. Naturforsch. 52b, 815—818 (1997); received February 14 1997 
  Published    1997 
  Keywords    Silenes, Silene Dimerization, 2, 3-Disilanaphthalene Tetrahydro, 1, 2-Disilacyclobutane 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0815.pdf 
 Identifier    ZNB-1997-52b-0815 
 Volume    52 
55Author    Z. NaturforschRequires cookie*
 Title    Acyclo C-Nucleosides Analogues of Condensed 1,2,4-Triazines  
 Abstract    1-Acyclo C-nucleosides of 7-methyl-10//-l,2,4-triazolo[3,,4':3,4][l,2,4]triazino[5,6-£>]indoles (9) have been prepared by cyclodehydrogenation of the sugar derivatives of 3-hydrazino-8-methyl-5//-l,2,4-triazino[5,6-6]indole (1). The respective linear isomer as 4 has been pre­ pared by a dehydrative cyclization of the amides of 1. Acetylation of the sugar hydrazones and their cyclized products gave the per-7V,0-acetyl derivatives. The molecular connectivity of the products was established by *H, 13C, and 2D H ,H Cosy spectra. 
  Reference    Z. Naturforsch. 52b, 873—882 (1997); received February 17 1997 
  Published    1997 
  Keywords    Acyclo C-Nucleoside, 1, 2, 4-Triazine, Indole, Triazinoindole, Triazolotriazinoindole 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0873.pdf 
 Identifier    ZNB-1997-52b-0873 
 Volume    52 
56Author    B. Erthold Kersting, G. Unther SteinfeldRequires cookie*
 Title    On the M etalation o f 2,6-Dimethyl-4-ter/-butyl-thiophenol  
  Reference    Z. Naturforsch. 53b, 1239—1240 (1998); received August 5 1998 
  Published    1998 
  Keywords    M etalation, 2, 6-Dim ethyl-4-rm -butyl-thiophenol, Lithium, Sulfur 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1239_n.pdf 
 Identifier    ZNB-1998-53b-1239_n 
 Volume    53 
57Author    Joachim Pickardt, Benedikt StaubRequires cookie*
 Title    Metallkomplexe mit 2,2'-Dipyridylamin als Liganden: Kristallstrukturen der Komplexe mit CdX2 (X = Cl, Br, I) und CuCN Metal Complexes with 2,2'-Dipyridylamine as Ligand: Crystal Structures o f the Com plexes with CdX2 (X = Cl, Br, I) and CuCN  
 Abstract    Reactions of 2,2'-dipyridylamine (dpyam) with cadmium halides yield crystals of [Cd(dpyam)(H20)C l2] (1), [Cd(dpyam)Br2] (2), and [Cd(dpyam)I2] (3). With CuCl2 and KCN a complex [C u(dpyam)C N ]H 20 (4) is obtained. Depending on the size of the halide ions the coordination changes from octahedral in 1 to trigonal bipyramidal in 2 and tetrahedral in 3. The coordination in 4 is trigonal. Due to the geometric strain imposed by the ligand all coordination polyhedra show significant distortions. 1 and 2 form dimers by halide bridges. With the excep­ tion of 3 all compounds form "supramolecular" structures via hydrogen bonds, e.g. chains or networks. 
  Reference    Z. Naturforsch. 54b, 329—336 (1999); eingegangen am 10. Dezember 1998 
  Published    1999 
  Keywords    2, 2'-Dipyridylamine Complexes, Cadmium Halides, Copper(I) Cyanide, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0329.pdf 
 Identifier    ZNB-1999-54b-0329 
 Volume    54 
58Author    R. An D, H. Swellem, YehiaA A Lla, G. Alal, A.M N Aw, W. ArRequires cookie*
 Title    Cinnamoylacetonitrile in Heterocyclic Synthesis, Part 7 [1]. Simple Synthesis of Benzothiazepines, Pyrones and Oxazolopyridine  
 Abstract    A facile synthesis of the entitled compounds is reported starting with cinnamonitrile. 
  Reference    Z. Naturforsch. 54b, 1197—1201 (1999); received March 3 1999 
  Published    1999 
  Keywords    Cinnamoylacetonitrile, 2, 4-Diarylbenzothiazepines, Dehydrogenation, Tetra-chloro-o-benzoquinone, Acylation 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1197.pdf 
 Identifier    ZNB-1999-54b-1197 
 Volume    54 
59Author    AthanassiosK. Boudalisa, Vassilios Nastopoulos3, Ans Terzisb, CatherineP. Raptopouloub, SpyrosP. Perlepes3Requires cookie*
 Title    Reaction between Yttrium Nitrate and 2,2':6,2"-Terpyridine (terpy) in MeCN: Preparation, Crystal Structures and Spectroscopic Characterization of [Y (N 03)3(terpy)(H20 )] and [Y(N03)3(terpy)(H20 )] * terpy * 3 MeCN  
 Abstract    The reaction of Y(NC>3)3 5H2O and 2,2':6',2"-terpyridine (terpy) in MeCN leads to [Y(N0 3)3(terpy)(H20)] (1) and [Y(N0 3)3(terpy)(H2 0)] terpy-3MeCN (2) in good yields de­ pending on the isolation conditions. The structures of both complexes were determined by single-crystal X-ray crystallography. The Y m atom in 1 is 9-coordinate and ligation is pro­ vided by one terdentate terpy molecule, two chelating nitrates, one monodentate nitrate and one terminal H2O molecule; the coordination polyhedron about the metal may be viewed as a tricapped trigonal prism. The Y ni atom in 2 is 10-coordinate and its coordination sphere consists of three nitrogen atoms from the terdentate terpy, six oxygen atoms from the three chelating nitrates (one of them being "anisobidentate") and one oxygen atom from a terminal H2O molecule; the polyhedron about the metal may be viewed as a distorted sphenocorona. The interstitial terpy is strongly hydrogen-bonded to the O atom o f the coordinated H2O molecule to form [Y(N0 3)3(terpy)(H2 0)j -terpy pairs. The new complexes were characterized by IR and 'H NMR spectroscopies. The Y in/N0 3 -/terpy chemistry is compared to the already well-developed Lnin/N0 3 _ /terpy chemistry (Ln = lanthanide). 
  Reference    (Z. Naturforsch. 56b, 122—128 [2001]; received August 8 2000) 
  Published    2001 
  Keywords    2, 2':6', 2"-Terpyridine Complexes, Yttrium Nitrate Complexes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0122.pdf 
 Identifier    ZNB-2001-56b-0122 
 Volume    56 
60Author    CyR. Il, P., G. In, J. L.Requires cookie*
 Title    Charge-Transfer Spectra of Some Heterocyclic Cations  
 Abstract    Energies of the first charge-transfer bands of complexes of heterocyclic pyridi-nium-like cations with various electron donors (the iodide ion, benzenoid h ydro­ carbons) yield linear correlations with the HMO energies of the lowest unoccupied rr-molecular orbitals (LUMO) o f the hetero­ cyclic acceptors. The experimental charge-transfer band maxima were taken from the literature. Charge-transfer band maxima for the complexes of the 2,4,6-trim ethylpyrylium cation with several electrons donors (diethyl-amine, N,N-dimethylaniline, pyridine N-oxide, anthracene) have been determined and compared with the analogous data for the tropylium cation. 
  Reference    (Z. Naturforsch. 30b, 984—986 [1975]; received June 23 1975) 
  Published    1975 
  Keywords    N-Methylpyridinium-like Cations, Tropylium Cation, 2, 4, 6-Trim ethylpyrylium Cation, HMO Calculations, Linear Correlations 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0984_n.pdf 
 Identifier    ZNB-1975-30b-0984_n 
 Volume    30 
Prev
1
2
3
4
5
Next