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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of the sterically hindered complexes [M(CO)"5(CNBR"2)][R CH(SiMe"3)"2; M Cr, Mo, or W]. Crystal structure of [Cr(CO)"5(CNBR"2)]
    Amsterdam : Elsevier
    Journal of Organometallic Chemistry 468 (1994), S. 143-148 
    Details
    ISSN: 0022-328X
    Keywords: Boron ; Carbonyl ; Crystal structure ; Group 6 ; Isocyanide ; Silicon
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-328X(94)80043-X
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  • 2
    Electronic Resource
    Electronic Resource
    Synthese und struktur eines stabilen 16-elektronen-alpha-acyl-esterenolat-iridium(III) -komplexes (Cl)(Ph3P)2IrC(O)CHC(OEt)O
    Amsterdam : Elsevier
    Journal of Organometallic Chemistry 479 (1994), S. 221-225 
    Details
    ISSN: 0022-328X
    Keywords: Crystal structure ; Enolate ; Iridium ; Metallacycle ; Phosphorus ; X-ray diffraction
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-328X(94)84113-6
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  • 3
    Electronic Resource
    Electronic Resource
    Metallkomplexe mit biologisch wichtigen Lisganden, LXXXIPart LXXX: Ref.. Synthese und Kristallstruktur von Rh(I)-Komplexen mit α-Aminocarboxylat-Liganden (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 1127-1130 
    Details
    ISSN: 0009-2940
    Keywords: Rhodium(I) ; α-Aminocarboxylate ; Crystal structure ; Hydrogen bonding ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Metal Complexes Containing Biologically Important Ligands, LXXXPart LXXX: Ref. .  -  Synthesis and Crystal Structure of Rhodium(I) Chelates with α-Amino Carboxylates Part LXXX: Ref.The α-amino carboxylate complexes were prepared from Rh(Cl)(CO)(PPh3)2 and H2NC(H)(R)CO2 in the presence of AgBF4 and characterized by X-ray diffraction. In the crystal the complexes form chains by hydrogen bridges between amino and carboxylate groups of adjacent molecules.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951281111
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  • 4
    Electronic Resource
    Electronic Resource
    Tellurium Polycations Stabilized by Halogenobismutates - Syntheses and Crystal Structure of te4[bi6Cl20] and te4[bi2br8] (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1189-1192 
    Details
    ISSN: 0009-2940
    Keywords: Tellurium ; Bismuth ; Tetratellurium(2+) ; Halogenobismutates(III) ; Crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of Te, TeX4 and BiX3 [X = Cl, Br] in sealed, evacuated glass ampoules in the temperature range 170° 100°C yields a variety of compounds composed of tellurium polycations and halobismutate anions. Two of these have been identified by crystal structure analyses as Te4[Bi6Cl20] (triclinic, P., a = 738.8(2), b = 875.1(2), c = 1389.1(6) pm, α = 87.89(2), β = 82.87(4), γ = 87.89(2) ·, Z = 1) and Te4[Bi2Nr8 (triclinic, P., a = 726.0(4), b = 773.7(4), c = 901.8(5) pm, α = 92.95(2), β = 102.23(2), γ = 92.87(2)., Z = 1). Both compounds were obtained as black crystals with a violet lustre and contain square-planar Te42+ cations. Te4[Bi6Cl20] contains a two-dimensional polymeric anion [Bi6Cl20]2- made up of corner- and edge-sharing BiCl6 octahedra with attached BiCl3 groups. The Bi-Cl distances vary over a very wide range from 245 to 334 pm. Te4[Bi2Br8] consists of a onedimensional chain [BiBr2Br4/2-[n of cis-edge-connected BiBr6 octahedra with Bi-Br distances ranging from 264 to 318 pm.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300904
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  • 5
    Electronic Resource
    Electronic Resource
    Tetralithium Bis(ethylaluminum) Tetrakis(catecholate) Pentakis(dimethoxyethane): An Oxygen-Rich Cluster [(Al++2(Li+)4(O18)-8] in a C36H44 Hydrocarbon Shell (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 2075-2077 
    Details
    ISSN: 1434-1948
    Keywords: Polyion aggregates ; Crystal structure ; Density functional theory calculations ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The structure determination of the lipophilically wrapped cluster {[Al2Li4O18](C36H44)}∞, a novel material crystallized from a mixture of [(C2H5)3Al]2, nBuLi, and catechol in DME solution, reveals five-coordinate Al++ and Li+ centers. According to density functional theory calculations, the eight negative charges are well-delocalized over the oxygen-rich framework.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis and Crystal Structure of [Re2Br4(Te2)(TeBr)2(TeBr2)2], a Dinuclear Complex with Te22-, TeBr-, and TeBr2 Ligands (1999)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 839-842 
    Details
    ISSN: 1434-1948
    Keywords: Rhenium ; Tellurium ; Bromine compounds ; Dinuclear rhenium complex ; Crystal structure ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of ReBr4, Te and TeBr4 in SiBr4 as solvent in a sealed glass ampoule at 150 °C yields black crystals of Re2Te6Br10. As the X-ray crystal structure determination shows [monoclinic, P21, Z = 2, a = 1127.5(1), b = 861.85(9), c = 1231.0(2)pm, β = 105.47(9)°], the structure consists of discrete dinuclear complexes. A Re-Re dumb-bell with d(Re-Re) = 279.9 pm is coordinated by a μ-Te2 group and two μ-TeBr groups. Additionally, each Re atom is coordinated to two terminal bromine atoms and a TeBr2 ligand leading to the formula [Re2Br4(Te2)(TeBr)2(TeBr2)2]. Re2Te6Br10 is one of only a few compounds known in the ternary system Re/Te/Br.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    The Synthesis and Structure of Trimetaphosphimato Complexes of Hafnium and Zirconium (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 469-476 
    Details
    ISSN: 1434-1948
    Keywords: Cage compounds ; Crystal structure ; Hafnium ; Trimetaphosphimates ; Zirconium ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The (trimetaphosphimato)hafnates and -zirconates Na4{Hf4(μ4-O)(μ-OH)6[(PO2NH)3]4} · 18 H2O [1, Pa3, a = 22.687(3) Å, Z = 8], Na4{Hf4(μ4-O)(μ-OH)6[(PO2NH)3]4} · 21 H2O [2, R3, a = 14.350(2), c = 50.348(10) Å, Z = 6], Na4{Zr4(μ4-O)(μ-OH)6[(PO2NH)3]4} · 18 H2O [3, Pa3, a = 22.693(3) Å, Z = 8], and Na4{Zr4(μ4-O)(μ-OH)6[(PO2NH)3]4} · 21 H2O [4, R3¯, a = 14.303(2), c = 50.284(10) Å, Z = 6] were obtained by the stoichiometric reaction of HfOCl2 · 8 H2O and ZrOCl2 · 8 H2O with an aqueous solution of Na3(PO2NH)3 · 4 H2O, followed by the diffusion-controlled addition of methanol. During these reactions compounds 1 and 2, or 3 and 4, crystallized simultaneously and the hafnium and zirconium complexes 1 and 3, as well as 2 and 4, were found to be isostructural and isomorphous. The characteristic structural feature which is central to 1, 2, 3, and 4 is the complex tetranuclear anion {M4(μ4-O)(μ-OH)6[(PO2NH)3]4}4- with M = Zr or Hf. The anion consists of five corner-sharing adamantanoid cages. The central cage, {M4(μ4-O)(μ-OH)6}8+, has a tetracoordinated oxygen atom in the middle, and the other cages are formed by the trimetaphosphimate ions acting as tridentate ligands which coordinate to Hf or Zr. The water content of the compounds 1-4 could not be determined unequivocally by chemical analyses since the compounds are always obtained as mixtures of the rhombohedral (2/4) and cubic (1/3) phases. Thermal decomposition of compounds 1-4 starts above 120°C and leads to the formation of HfP2O7 and ZrP2O7/NaZr2(PO4)3, with the evolution of H2O and NH3. DSC measurements gave no evidence that the compounds 1 and 2, or 3 and 4, might be transformed into each other by heating.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Die Reaktion von SeCl4 mit Übergangsmetalltetrachloriden. Synthese und Kristallstrukturen von (SeCl3)2MCl6 mit M = Zr, Hf, Mo, ReProfessor Gerhard Thiele zum 60. Geburtstag gewidmet (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 292-296 
    Details
    ISSN: 0044-2313
    Keywords: Trichloroselenium(+) ; Hexachlorozirconate(2-) ; Hexachlorohafnate(2-) ; Hexachloromolybdate(2-) ; Hexachlororhenate(2-) ; Synthesis ; Crystal structure ; magnetic properties ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Reaction of SeCl4 with Transition Metal Tetrachlorides. Synthesis and Crystal Structures of (SeCl3)2MCl6 with M = Zr, Hf, Mo, ReThe transition metal tetrachlorides ZrCl4, HfCl4 and MoCl4 react with SeCl4 in closed ampoules at temperatures of 140°C to (SeCl3)2MCl6 (M = Zr, Hf, Mo) which are all isotypic and crystallize in the (SeCl3)2ReCl6 structure type (orthorhombic, Fdd2, Z = 8, lattice constants for M = Zr: a = 1165.7(1)pm, b = 1287.2(2)pm, c = 2180.2(2)pm; for M = Hf: a = 1162.9(2)pm, b = 1285.0(2)pm, c = 2178.2(3)pm; for M = Mo: a = 1153.8(1)pm, b = 1267.7(1)pm, c = 2147.4(2)pm). The Cl- ions form a hexagonal closest packing with one fourth of the octahedral holes filled by Se4+ and M4+ in an ordered way. The MCl6 octahedra are regular, the SeCl6 octahedra are distorted with 3 short and 3 long Se—Cl bonds (mean 215 pm and 287 pm). The structures can thus be regarded as built of SeCl3+ and MCl62- ions. Magnetic susceptibility measurements show for M = Zr the expected diamagnetic behavior, for M = Mo and Re paramagnetic behavior according to the Curie-Weiss law with magnetic moments of 2.5 B. M. for M = Mo and 3.7 B. M. for M = Re corresponding to 2 and 3 unpaired electrons respectivly.
    Notes: Die Übergangsmetalltetrachloride ZrCl4, HfCl4 und MoCl4 reagieren mit SeCl4 in geschlossenen Ampullen bei Temperaturen von 140°C zu (SeCl3)2MCl6 (M = Zr, Hf, Mo), die alle isotyp sind und im (SeCl3)2ReCl6-Typ kristallisieren (orthorhombisch, Fdd2, Z = 8, Gitterkonstanten für M = Zr: a = 1165,7(1)pm, b = 1287,2(2)pm, c = 2180,2(2)pm; für M = Hf: a = 1162,9(2)pm, b = 1285,0(2)pm, c = 2178,2(3)pm; für M = Mo: a = 1153,8(1)pm, b = 1267,7(1)pm, c = 2147,4(2)pm). Die Anionen bilden eine hexagonal dichteste Kugelpackung, in der ein Viertel der Oktaederlücken geordnet von Se4+ und M4+ besetzt ist. Die MCl6-Oktaeder sind regelmäßig, die SeCl6-Oktaeder mit drei kurzen und drei langen Se—Cl-Abständen (im Mittel 215 pm und 287 pm) stark verzerrt. Die Strukturen können damit als aus SeCl3+- und MCl62--Ionen aufgebaut betrachtet werden. Die Messung der magnetischen Suszeptibilität ergibt für (SeCl3)2ZrCl6 den erwarteten Diamagnetismus, für (SeCl3)2MoCl6 und (SeCl3)2ReCl6 paramagnetisches Verhalten nach dem Curie-Weiss-Gesetz und magnetischen Momenten von 2,5 B.M. entsprechend 2 ungepaarten Elektronen für M = Mo und 3,7 B. M. entsprechend 3 ungepaarten Elektronen für M = Re.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966220215
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