Go toArchive
Browse byFacets
Bookbag ( 0 )
Facet   Publication Year 2001  [X]
Facet   section ZfN Section B  [X]
Results  200 Items
Sorted by   
Publication Year
2001[X]
121Author    M. Uham, M. Ad, Shaiq Ali, Muhammad Saleem, Viqar Uddin, Ahm Ad, Simin Shameel, H.E JRequires cookie*
 Title    Phytol and Glycerol Derivatives from the Marine Green Alga Codium iyengarii of the Karachi Coast (Arabian Sea)  
 Abstract    C odium iyengarii, Chlorophyceae, Codiosides The ethyl acetate soluble part of a methanolic extract o f the marine green alga Codium iyengarii, collected from the Karachi coast of the Arabian Sea, afforded four new derivatives of glycerol named : codioside A,B,C,D (1-4), a new derivative of frans-phytol named codio-ester (5) and rrans-phytol (6). The structures of 1 -5 were elucidated with the aid of acid hydrolysis, methylation, GC-MS, and spectroscopy. The structure o f 1 was confirmed through the H M BC NM R technique and the structures of compounds 2 -4 were based on the assign­ m ents made for 1 . 
  Reference    Z. Naturforsch. 56b, 837 (2001); received March 3 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0837.pdf 
 Identifier    ZNB-2001-56b-0837 
 Volume    56 
122Author    Erum Akbar, HafizRub Nawaz, Abdul MalikRequires cookie*
 Title    Dihydroquinol and Quinol Derivatives from Ajuga parvißora  
 Abstract    Ajuga parviflora, Labiatae, Dihydroquinol and Quinol Derivatives Dihydroquinol derivative 1, quinol glucopyranoside 2 and quinol derivative 3 have been isolated from the ethyl acetate soluble fraction o f A juga parviflora and their structures have been elucidated through spectroscopic studies as methyl 2-[2,2-dim ethyl-6-oxo-7-dihydro-l,3-benzodioxol-3(6//)-yl]aceate (1), 2-hydroxy-4/?-methyl-4a-(/?-D-glucopyranoside)-2,5-cyclo-hexadien-l-one (2) and (4-oxo-2,5-cyclohexadien-l-yl)acetic acid (3). The known quinol 4 has also been isolated for the first time from this species. 
  Reference    Z. Naturforsch. 56b, 842 (2001); received April 4 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0842.pdf 
 Identifier    ZNB-2001-56b-0842 
 Volume    56 
123Author    Anton Hammerl3, G. Hollb, M. Kaiserb, ThomasM. Klapötke3, Peter Mayer3, Holger Piotrowski3, Martin Vogt3Requires cookie*
 Title    Methylated Ammonium and Hydrazinium Salts of 5,5'-Azotetrazolate  
 Abstract    Ammonium, Azotetrazolate, Hydrazinium Salts of the 5,5'-azotetrazolate dianion with methylated ammonium and hydrazinium cations were prepared. The compounds were characterized by elemental analysis, vibrational (IR, Raman) and multinuclear NMR spectroscopy (*H, 13C, 14N). The crystal structures of the di[ammonium], the bis[dimethylammonium] and the bis[trimethylhydrazinium] 5,5'-azo­ tetrazolate salts were determined. The thermal, shock and friction sensitivities of these com­ pounds were investigated and their explosion products were analysed. 
  Reference    Z. Naturforsch. 56b, 847—856 (2001); received April 30 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0847.pdf 
 Identifier    ZNB-2001-56b-0847 
 Volume    56 
124Author    Anton Hammerla, Gerhard Hollb, M. Kaiserb, ThomasM. Klapötke3, Peter Mayer3, Heinrich Nöth3, Holger Piotrowski3, Max Suter3Requires cookie*
 Title    New Hydrazinium Salts of 5,5'-Azotetrazolate  
 Abstract    Azotetrazolate, High Nitrogen Materials, Hydrazinium Salts of the 5,5'-azotetrazolate dianion with several different hydrazinium cations were pre­ pared. The compounds were characterized by elemental analysis, vibrational spectroscopy (IR, Raman) and multinuclear NMR spectroscopy ('H, i3C, l4 N). The crystal structures of the di-terf-butylhydrazinium, the ethylenedihydrazinium, the diguanidinium and the bis-triamino-guanidinium azotetrazolate were determined. The thermal, shock and friction sensitivities of all compounds were investigated and their explosion products were analysed. For the 5,5'-azotetr-azolate dianion the structure was calculated with density functional theory (B3-LYP). An NBO analysis was performed for the 5,5'-azotetrazolate dianion in order to understand the charge distribution of the dianion. Results and Discussion Synthesis an d p ro p e rtie s 
  Reference    Z. Naturforsch. 56b, 857—870 (2001); received April 30 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0857.pdf 
 Identifier    ZNB-2001-56b-0857 
 Volume    56 
125Author    Gerhard Müller, Martin LutzRequires cookie*
 Title    A Curious Case of Partial Spontaneous Resolution on Crystallization of a Racemate. The Crystal and Molecular Structures of N-Acetyl-DL-alanine Methylester and iV-Acetyl-L-alanine Methylester  
 Abstract    Chirality, Racemate, Amino Acids /V-Acetyl-L-alanine methylester crystallizes in the orthorhombic space group P 2 \2 \2 \ with one molecule in the asymmetric unit (a = 7.768(1), b = 9.606(1), c = 10.215(2) A, Z = 4). The individual molecules are linked into infinite strands by intermolecular hydrogen bonds between the amide hydrogen atom as donor and the acetyl oxygen atom as acceptor. The strands run parallel to the crystallographic b axis. The respective racemate, /V-acetyl-DL-alanine methylester, crystallizes in the monoclinic space group P 2 i/n with three molecules in the asymmetric unit (,a = 14.442(3), b = 8.467(2), c = 19.336(5) Ä, ß = 93.68(1)°, Z = 12). Again, the individual molecules are linked into infinite strands by N-H" 0= C aCetyi hydrogen bonds which run along the crystallographic a axis. The individual strands are made up of molecules of opposite chirality in a 2:1 ratio. More specifically, one set of strands consists of molecules in the sequence [D, D, L,]oo w hile a second set has the sequence [l, l, Djoo as imposed by the centrosymmetry o f the space group. Thus, although crystals o f /V-acetyl-DL-alanine methylester contain equal amounts o f the m olecules o f opposite chirality, the strand formation through intermolecular hydrogen bonds leads to an incom plete resolution o f the racemic mixture o f m olecules within one strand. The reason for the preference o f the observed structure o f /V-acetyl-DL-alanine methylester over spontaneous resolution is seen in the optimization o f hydrogen bonding within one strand versus the overall crystal packing energy. Som e principles o f the crystallization o f achiral m olecules, chiral m olecules, and racemates are briefly reviewed, as is the phenomenon o f spontaneous resolution. 
  Reference    Z. Naturforsch. 56b, 871—880 (2001); received June 5 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0871.pdf 
 Identifier    ZNB-2001-56b-0871 
 Volume    56 
126Author    Rosa Carballo3, Alfonso Castiñeirasb, Teresa PérezbRequires cookie*
 Title    Group 12 Metal Complexes of 2-Formylpyrrole-(4PLx) and 2-Acetylpyrrole-N(4)-phenylthiosemicarbazone (4P12), as Examples form Different Donor Modes. Crystal and Molecular Structures of [Hg(4PLr H)Br]2 and [Zn(4PL2)2Br2] * 2 EtOH  
 Abstract    The reactions of 4N-phenyl-2-[ 1 -(pyrrol-2-yl)methylidene]-hydrazine carbothioamide (4PLi) and 4 Ar-phenyl-2-[l-(pyrrol-2-yl)ethylidene]-hydrazine carbothioamide (4PL2) with Group 12 metal halides afford complexes of types [M(L)2Xi] [M = Zn, L = 4PLi or 4PL2, X = Cl, Br or I; M = Cd, L = 4PL, and X = Cl, or L = 4PL2 and X = Cl, Br or I] and [M(L)X2] [M = Cd, L = 4PLi, X = Br or I; M = Hg, L = 4PLi or 4PL2, X = Cl, Br or I]. The new compounds were characterized by elemental analysis, FAB mass spectrometry, IR spectroscopy, and, in the case of sufficiently soluble compounds, 'H, l3C and, when appropriate, ll3Cd or 199Hg NMR spectrometry. The structures of [Hg(4PLi-H)Br] and [Zn(4PL2)2Br2] • 2 EtOH were also studied by single-crystal X-ray diffractometry. In [Hg(4PL|-H)Br] crystallized from the mother liquor of its synthesis, 4PLi behaves as a monodeprotonated S,iV-bidentate ligand. Otherwise, with Hg(II), Zn(II) and Cd(II), 4PLi and 4PL2 both behave as neutral S-monodentate ligands. 
  Reference    Z. Naturforsch. 56b, 881—888 (2001); received June 12 2001 
  Published    2001 
  Keywords    Pyrrole, Thiosemicarbazones, Group 12 Metal Complex 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0881.pdf 
 Identifier    ZNB-2001-56b-0881 
 Volume    56 
127Author    Matthias Frey, PeterG. JonesRequires cookie*
 Title    Secondary Bonding Interactions in Some Halopyridinium and Dihalopyridinium Halides  
 Abstract    The packing motifs of 2-and 3-chloropyridinium chloride can be interpreted in terms of classical hydrogen bonds N+-H -C 1~ and non-classical C-H--C1" interactions, with halo-gen-halogen contacts playing a subordinate role. In the corresponding bromine derivatives, Br--Br interactions are much more important. Of the dihalo derivatives, 3,5-dichloropyridinium chloride crystallises with classical linear hydrogen bonds of the form N+-H -C1_ , but its chlorine-chlorine interactions are at best weak; the corresponding bromine derivative displays aggregates of bromine atoms and three-centre hydrogen bonds N+-H (-B r")2 . 
  Reference    Z. Naturforsch. 56b, 889—896 (2001); received May 15 2001 
  Published    2001 
  Keywords    Pyridinium, Halides, Hydrogen Bonds 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0889.pdf 
 Identifier    ZNB-2001-56b-0889 
 Volume    56 
128Author    A. Elmali3, Y. Elerman3, I. SvobodabRequires cookie*
 Title    Magnetic Properties and Crystal Structure of a Dinuclear Iron(III) Complex  
 Abstract    Binuclear Iron(III) Complex, Super-Exchange Interactions, Antiferromagnetic Coupling [FeL(MeOH)Cl]2 (L = N-(5-methylphenyl)-3-methoxysalicylaldimine) was synthesized and its crystal structure determined, [CsoFhöCbFeaNiOö], triclinic, space group P \, a = 7.481(2), 6 = 9.436(2), c = 10.961(2) A, a = 69.790(10),/9 = 82.440(10), 7 = 83.690(10)°, V=718.1(3) A , Z = 1. Two identical [FeLCl] fragments, related by an inversion centre, are connected by two bridging O atoms to form a binuclear unit. The iron(III) centers are separated by 3.196(2) A and weakly antiferromagnetically coupled (J = -10.4(1) cm-1), which follows from temperature-dependent magnetic susceptibility measurements in the range 5.1 to 275.6 K. The magnetic moment at 275.6 K is ca. 7.02 B. M., but 0.99 B. M. at 5.1 K. The magnetic susceptibility is at a maximum near 80 K and decreases rapidly as the temperature is lowered to liquid helium temperature. 
  Reference    Z. Naturforsch. 56b, 897—900 (2001); received May 3 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0897.pdf 
 Identifier    ZNB-2001-56b-0897 
 Volume    56 
129Author    MarcoH. Klingele, Gunther Steinfeld, Berthold KerstingRequires cookie*
 Title    Synthesis and Coordination Chemistry of Novel Binucleating Macrocyclic Ligands with Amine-thioether and Amine-thiophenolate Donor Functions  
 Abstract    The ability of the aromatic tetraaldehyde l,2-bis(4-rm-butyl-2,6-diformylphenylsulfanyl)-ethane (1) to function as a precursor in the preparation of binucleating hexaamine-dithiolate lig­ ands has been investigated. Reductive amination of compound 1 with bis(aminoethyl)amine un­ der medium-dilution conditions affords the macrobicyclic hexaamine-dithioether compound L 1. Deprotection of the [1+2] condensation product gives the corresponding 24-membered hexa-amine-dithiophenol ligand H2L2. The formulation of L 1 as a macrobicyclic amine-thioether was confirmed by an X-ray crystal structure determination of the tetranuclear nickel(II) complex of L 1, [{ (L jN iiC lili^ -C l^K B P h ;) (2b). The formulation of the doubly deprotonated form (L2)2-of H2L2 as a 24-membered amine-thiophenolate ligand was confirmed by an X-ray crystal structure determination of the dinuclear cobalt(III) complex, [(L2)Com(^-OH)](C1 0 4) 2 • Cl (3). The preparation and the crystal structures of the new compounds are described. 
  Reference    Z. Naturforsch. 56b, 901—907 (2001); received June 5 2001 
  Published    2001 
  Keywords    Macrocyclic Ligands, Nitrogen, Sulfur 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0901.pdf 
 Identifier    ZNB-2001-56b-0901 
 Volume    56 
130Author    H. Oppermann, H. Dao Quoc, M. Zhang-PreßeRequires cookie*
 Title    Thermical and Calorical Behaviour of Solid LaAl3Br12 and Chemical Transport of LaBr3 with AlBr3  
 Abstract    The thermodynamical data of solid Lanthanum Aluminium Bromide LaAl3 Br12 have been obtained by determination of the decomposition equilibria from total pressure measurements. For different compositions LaBr3 /AlBr3, the barogram of the binary system LaBr3 -AlBr3 was constructed and from this and DTA the melting diagram was determined. The chemical trans­ port of LaBr3 with AlBr3 is suggesting the existence of two gaseous complexes LaAl3 B r12 and LaAl?Br9. The data are: Z\H°B(LaAl3B rl2,f,298) = -587,2 ± 7 kcal/mol, S°(LaAl3Br12,f,298) = 179,3 ± 7 cal/Kmol; zAH°B(LaAl3B r12,g,298) = -548,7 ± 5 kcal/mol, S°(LaAl,Br12,g,298) = 239,4 ± 6 cal/K mol; Z\H°B(LaAl2Br9,g,298) = -619,7 ± 5,5 kcal/mol, S°(LaAl2Br9,g,298) = 212,0 ± 7 cal/K mol. From solution calorimetric measurements follows the enthalpy of formation of the solid com­ plexes: zAH°B(LaAl3Br12,f,298) = -590,9 ± 3 kcal/mol. Thermisches und kalorisches Verhalten von festem LaAl3Br12 
  Reference    Z. Naturforsch. 56b, 908—916 (2001); eingegangen am 10. Mai 2001 
  Published    2001 
  Keywords    Lanthanum Alumimium Bromide, Calorimetry, Enthalpy 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0908.pdf 
 Identifier    ZNB-2001-56b-0908 
 Volume    56 
131Author    H. Oppermann, M. Zhang-PreßeRequires cookie*
 Title    Thermochemische Untersuchungen zu den Systemen SE203-Se02. II. Samariumselenoxide auf dem Schnitt Sm203-Se02 Thermochemical Investigations of Systems SE20 3-S e0 2. II. Samarium Selenium Oxides on the Line Sm20 3-S e 0 2  
 Abstract    The pure ternary phases on the line Sm2 0 3 -Se02: Sm2 Sev0 3 +2 V in thermodynamical equilibri­ um have been synthesizied by solid state reactions and characterized by X-ray powder diffrac­ tion, IR spectroscopy and DSC measurements. The existence of two new phases Sm2 Se, 5 0 6 and Sm2 Se4 O n was demonstrated besides the known phases Sm2 Se3 5 O 10, Sm2 Se3 0 9 and Sm2 S e0 5. The thermal decomposition properties of all compounds have been determined by total pressure measurements and the thermodynamical data of the compounds have been derived from their decomposition function and Cp-values. The phase diagram and the phase barogram have been estabilished using the results of DSC and total pressure measurements. 
  Reference    Z. Naturforsch. 56b, 917—926 (2001); eingegangen am 28. Mai 2001 
  Published    2001 
  Keywords    Samarium Selenium Oxides, Thermal Decomposition, Phase Diagram 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0917.pdf 
 Identifier    ZNB-2001-56b-0917 
 Volume    56 
132Author    Alfonso Castiñeiras3, Ricardo Domínguez3, Jairo Bordinhãob, Julieta Saldanha De Oliveirab, João Adaílton, Manfredo Bortoluzzib, HörnerbRequires cookie*
 Title    Synthesis and Crystal Structure of [Bis(N-oxo-2-acetylpyridine 4N-Methylthiosemicarbazone)zinc(II)] Monohydrate  
 Abstract    Polymeric Zinc(II) Complex, N-Oxo-2-acetylpyridine 4 N-Methylthiosemicarbazone The reaction of zinc(II) acetate dihydrate and the tetra-dentate N-Oxo-2-acetylpyridine 4 N-methylthiosemicarbazone (H4MLO) produces the novel complex [Zn(C9 H nN 4 0 S)2 -H2 0 ] (1). 
  Reference    Z. Naturforsch. 56b, 927—930 (2001); received January 8 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0927.pdf 
 Identifier    ZNB-2001-56b-0927 
 Volume    56 
133Author    Requires cookie*
 Title    Spectroscopic and Magnetostructural Evidence for the Formation of [Cu0.5Co0.5(H2Tea)X] Mixed-Crystal Compounds from Zerovalent Cu and Co Salts in the Presence of Triethanolamine (H3Tea -Triethanolamine; X = SCN, Cl)  
  Reference    Z. Naturforsch. 56b, 931 (2001) 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0931.pdf 
 Identifier    ZNB-2001-56b-0931 
 Volume    56 
134Author    EvaS. Schmidt, NorbertW. Mitzel, Hubert SchmidbaurRequires cookie*
 Title      
 Abstract    Gallium(III) Amide, Gallium Amido Complex, Lithium Gallate The dilithium diamide reagent obtained from N,N'-di('butyl)-l,4-diazabutadiene and two equivalents of lithium metal reacts with anhydrous gallium trichloride in tetrahydrofuran / hexane, followed by treatment with metallic potassium, to give the title compound in about 40% yield. Cyclic imides of gallium(III) and gallium(II) are by-products of this process. The structure of Li{[ds-C2 H2 (N'Bu)2 ]2 Ga} has been determined from single crystals containing one mole equivalent of tetrahydrofuran. The gallium atom is chelated by two diamide ligands. One of the five-membered chelate rings is planar while the second one is folded at its nitrogen 
  Reference    Z. Naturforsch. 56b, 937—939 (2001); received June 15 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0937.pdf 
 Identifier    ZNB-2001-56b-0937 
 Volume    56 
135Author    Matthias Wanner3, Ingo Hartenbach3, Jan Fiedler, Thomas Schleid3, Wolfgang Kaim3Requires cookie*
 Title    Zwei  
 Abstract    -und dreikemige Organometallkomplexe (ReS4)[MCl(C5Me5)], M = Rh, Ir, und (/x-WS4)[IrCl(C5Me5)]2 Dinuclear and Trinuclear Organometallic Complexes (ReS4)[MCl(C5Me5)], M = Rh, Ir, and (Ai-WS4)[IrCl(C5Me5)]2 The reactions of tetrathiorhenate(VII) or tetrathiotungstate(VI) with [MCl2 (C5 Me5)]2, M = Rh or Ir, yield the neutral title compounds of which (ReS4)[RhCl(C5 Me5)] and (/a-WS4)[IrCl(C5 Me5) ] 2 could be crystallographically characterized. The molecules contain nearly tetrahedral M'S4 units and rhodium(III) or iridium(III) centers with piano stool geometry. Weak intermolecular (M)C1--H(Me) interactions are observed in the crystals. Vibrational and elec­ tronic spectra are in agreement with the structures, illustrating p—d charge transfer interactions between the sulfide or chloride donors and the d° or d6 metal acceptor centers, respectively. Oxidation and reduction of the compounds occur completely irreversibly. 
  Reference    Z. Naturforsch. 56b, 940—946 (2001); eingegangen am 29. März 2001 
  Published    2001 
  Keywords    Iridium Compounds, Rhodium Compounds, Tetrathiometallates 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0940.pdf 
 Identifier    ZNB-2001-56b-0940 
 Volume    56 
136Author    Bernd Wrackmeyer3, Hartmut OehmeRequires cookie*
 Title    29Si-29Si and 29Si-13C Indirect Nuclear Spin-Spin Coupling, and Isotope-Induced Chemical Shifts 1A 12/13 C(29Si) and 1A 28/29Si(13C), Determined for Silenes Stabilized by Intramolecular N-Si Coordination  
 Abstract    Silicon, Silenes Two intramolecularly donor-stabilized silenes, l-(8-dimethylamino-l-naphthyl)-l,2,2-tris-(trimethylsilyl)silene (1), and l-[bis-2 ,6 -(dimethylaminomethyl)phenyl]-l,2 ,2 -tris(trimethyl-silyl)silene 2, were studied by 2 9 Si and C NMR spectroscopy, using polarization transfer techniques in order to determine coupling constants V (2 9 Si,2 9 Si) in = 1,2, 3) and '/ (2 9 Si,l3 C) together with isotope-induced chemical shifts 1 zA12/l3 C(2 9 Si) and Z\2 8 / ~9 Si(C). 
  Reference    Z. Naturforsch. 56b, 947—950 (2001); received May 10 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0947.pdf 
 Identifier    ZNB-2001-56b-0947 
 Volume    56 
137Author    Requires cookie*
 Title    Organophosphorus Compounds, Part 146* Imidovanadium(V) Complexes as Reaction Partners for Kinetically Stabilized Phosphaalkynes. Synthesis and Reactivity of 3-Aza-l,2,4,6-tetraphospha-quadricyclanes  
  Reference    Z. Naturforsch. 56b, 951 (2001) 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0951.pdf 
 Identifier    ZNB-2001-56b-0951 
 Volume    56 
138Author    G. C. Papavassiliou3, A. Terzisb, C.P R Ap ToRequires cookie*
 Title    Pyrazino-methyl-ethylenedithio- tetrathiafulvalene, Precursor o f r-Phase Conductors  
 Abstract    M odifications of the previously reported meth­ ods of preparation of racemic pyrazino-methyl-ethylenedithio-tetrathiafulvalene, i.e., 2-(5,6-dihy-dro-5-methyl-l,3-dithiolo[4,5-b][l,4]dithiin-2-yl-idene)-l,3-dithiolo[4,5-b]pyrazine, and their cat­ ion radical salts with linear counter anions are re­ ported. ESR spectra and preliminary X-ray dif­ fraction measurements indicate that the salts crystallize in the r-phase (tetragonal system). In troductio n 
  Reference    Z. Naturforsch. 56b, 963—9 (2001); received June 5 2001 
  Published    2001 
  Keywords    Tetrathiafulvalenes, Cation Radical Salts, Organic Conductors 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0963_n.pdf 
 Identifier    ZNB-2001-56b-0963_n 
 Volume    56 
139Author    Doris Knettel, Markus Reil, Nikolaus KorberRequires cookie*
 Title    Darstellung und Strukturaufklärung von Tricäsiumundecaphosphid- Ammoniakat(l/3) CS3PH * 3 NH3 Synthesis and Crystal Structure of Tricesium Undecaphosphide-Ammonia(l/3) Cs3Pn * 3 NH3  
 Abstract    Polyphosphides, Liquid Ammonia, Tricesium-undecaphosphide-ammonia(l/3) Cs3 P M • 3 NH3 Cs3 P| j • 3 NH3 was obtained from a solution of Cs3 P ]} in liquid ammonia. Its structure consists of Pn 3_-cage anions, which coordinate the cesium cations together with ammonia molecules, resulting in a three-dimensional network. The compound completes a family of structures that are derived from the binary phosphide Cs3 P ], through the stepwise expanding and dismantling of the three-dimensional network of ions by ammonia molecules of coordination or through the exchange of the cesium cations for voluminous molecular cations. 
  Reference    Z. Naturforsch. 56b, 965—969 (2001); eingegangen am 27. Juni 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0965.pdf 
 Identifier    ZNB-2001-56b-0965 
 Volume    56 
140Author    Y. Elerman3, A. ElmRequires cookie*
 Title    Magnetic Properties and Crystal Structure of a 3,5-Dimethylpyrazolate-Bridged Binuclear Copper(II) Complex  
 Abstract    Binuclear Copper(II) Complex, Super-Exchange Interactions, Antiferromagnetic Coupling [CuiL(prz)] (prz = 3,5-dimethylpyrazole and L = l,3-bis(5-bromo-2-hydroxybenzylidene)-propan-2-ol) was synthesized and its crystal structure determined. It crystallizes in the or­ thorhombic space group Pbca with a = 14.160(9), b = 15.109(4), c = 21.298(5) Ä, V = 4557(1) A3, Z = 8 . Two copper(II) ions are in a square-planar coordination. The metal co­ ordination sphere is four-coordinate, with a planar N2O2 donor set. The dihedral angle between the two coordination planes is 12.14(7)°. The copper(II) centers are separated by 3.365(1) A and antiferromagnetically coupled (J = -214.3 cm-1), which follows from temperature-dependent magnetic susceptibility measurements in the temperature range 4.6 to 310 K. The Cu-O-Cu an­ gle is 125.9(1)° in the super-exchange pathway. The magnetic moment at 310 K is ca. 
  Reference    Z. Naturforsch. 56b, 970—97476 (2001); received November 27 2000 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0970.pdf 
 Identifier    ZNB-2001-56b-0970 
 Volume    56 
Prev
...
6
7
8
9
10
Next