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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1201-1202 
    ISSN: 0044-2313
    Keywords: Cobalt(II) complex ; 1,2-dimethyl-5-nitro-imidazole ligand ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Crystal Structure of Bis(1,2-dimetyl-5-nitro-imidazole)dichlorocobalt(II)Bis(1,2-dimethyl-5-nitro-imidazol)dichlorocobalt(II) was obtained by reaction of CoCl2 · 6 H2O with 1,2-dimethyl-5-nitro-imidazole in methanol. The compound forms blue crystals which were characterized by IR and UV-vis spectroscopy and by an X-ray crystal structure determination. Co(C5H7N3O2)2Cl2: tetragonal, space group I42d, Z = 8, a = 1142.1(1) pm, c = 2577.3(2) pm. R = 0.036 for 670 independent reflexions. The Co atom is tetrahedrally surrounded by two chlorine and two N atoms at distances of 222.8(2) and 203.5(4) pm.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1033-1034 
    ISSN: 0044-2313
    Keywords: Tetraphenylphosphonium-tetradecachlorotetraarsenate(III) ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Tetraphenylphosphonium Tetradecachlorotetraarsenate(III), (PPh4)2As4Cl14The title compound was obtained by reaction of As4S4, PPh4Cl and chlorine in dichloromethane. According to its X-ray crystal structure analysis, the As4Cl142- ion can be described as an association product of two AsCl4- units and two AsCl3 molecules. The As atoms and ten Cl atoms are approximately in a plane, the remaining four Cl atoms alternately take positions above and below this plane. The As atoms have distorted ψ octahedral coordination.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0044-2313
    Keywords: Trinuclear zirconium complex ; phosphanido ligand ; phosphinidene ligand ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: P—H-functionalised Phosphanido Ligands in Transition Metal Chemistry: Molecular Structure of CpZr(μ-PHtBu)2(μ-PtBu)2 {Zr(μ-Cl)Cp}2The reaction of polymeric [CpZrCl3]n with solvent-free LiPHtBu yields the trinuclear ZrIII/ZrIV complex CpZr(μ-PHtBu)2(μ-PtBu)2 {Zr(μ-Cl)Cp}2 (1) in a redox reaction in low yield. The oxidation product (PHtBu)2 is observed by 31P-NMR spectroscopy. 1 crystallises tetragonal in the space group P43212 with a = 1130.5(5) pm and c = 3415.7(5) pm.
    Notes: Die Reaktion von polymerem [CpZrCl3]n mit solvatfreiem LiPHtBu liefert in einer Redoxreaktion den dreikernigen ZrIII/ZrIV-Komplex CpZr(μ-PHtBu)2(μ-PtBu)2{Zr(μ-Cl)Cp}2 (1) in geringer Ausbeute. 31P-NMR-spektroskopisch kann die Bildung des Oxidationsprodukts (PHtBu)2 gezeigt werden. 1 kristallisiert tetragonal in der Raumgruppe P43212 mit a = 1130,5(5) pm und c = 3415,7(5) pm.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 957-961 
    ISSN: 0044-2313
    Keywords: Cyclic thiophosphate ; cyclic thiochlorosilicate ; dichlorodithiophosphate ; dibromodithiophosphate ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Two New Cyclic Thioanions: (PPh4)2[1,3-P2S8] and (PPh4)2[Si2S6Cl2]. New Synthetic Access Routes to PPh4[PS2Cl2] and PPh4[ PS2Br2](PPh4)2[P2S8] was obtained from tetraphenylphosphonium polysulfide and white phosphorus in acetonitrile. According to its X-ray crystal structure analysis (4229 reflexions, R = 0.079) the P2S82- ion consists of a six-membered ring in chair conformation made up from four sulfur and two phosphorus atoms in 1,3 positions; in addition, each P atom has two terminal sulfur atoms. (PPh4)2[Si2S6Cl2] · 2 CH2Cl2 was obtained from Na2S4, PPh4Cl and SiCl4 in dichloromethane. The Si2S6Cl22- ion also has a six-membered ring structure, consisting of four sulfur and two silicon atoms in 1,4 positions (X-ray structure analysis, 2694 reflexions, R = 0.032). PPh4[PS2Cl2] is accessible by the following reactions: 1P4S3 + PPh4Cl + chlorine in CH2Cl2;2PSCl3 + Na2S4 + PPh4Cl in CH2Cl2;3PCl5 + Na2S4 + PPh4Cl in acetonitrile;4PCl3 + Na2S4 + PPh4Cl in acetonitrile;5P4S10 + Na2S4 + PPh4Cl in acetonitrile .P4S3 or react with PPh4Cl and bromine to yield PPh4[PS2Br2]. PPh4[PS2Cl2] crystallizes isotypic to PPh4[PS2Br2] in the BiPh4[ClO4] structure type with orientational disorder of the PS2Cl2- ions in positions with site symmetry 4.
    Notes: Aus Tetraphenylphosphonium-polysulfid und weißem Phosphor wurde in Acetonitril (PPh4)2[1,3-P2S8] hergestellt. Nach seiner Kristallstrukturanalyse mittels Röntgenbeugung (R = 7,9% für 4229 Reflexe) besteht das 1,3-P2S82--Ion aus einem sechsgliedrigen Ringgerüst in Sesselkonformation mit vier Schwefel- und zwei Phosphoratomen in 1,3-Stellung sowie zwei terminalen Schwefelatomen an den P-Atomen. (PPh4)2[Si2S6Cl2] · 2 CH2CI2 wurde aus Na2S4, PPh4Cl und SiCl4 in Dichlormethan erhalten. Das Si2S6Cl22--Ion hat ebenfalls ein sechsgliedriges Ringgerüst in Sesselkonformation, bestehend aus vier Schwefel- und zwei Si-Atomen in 1,4-Stellung (Röntgenstrukturanalyse mit 2694 Reflexen, R = 3,2%). Mit folgenden fünf Syntheseverfahren läßt sich PPh4[PS2Cl2] herstellen: 1P4S3 + PPh4Cl + Chlor in CH2Cl2;2PSCl3 + Na2S4 + PPh4Cl in CH2Cl2;3PCl5 + Na2S4 + PPh4Cl in Acetonitril4PCl3 + Na2S4 + PPh4Cl in Acetonitril5P4S10 + Na2S4 + PPh4Cl in Acetonitril.Aus P4S3 oder P4S10, PPh4Cl und Brom ist PPh4[PS2Br2] zugänglich. PPh4[PS2Cl2] kristallisiert isotyp zu PPh4[PS2Br2] im BiPh4[ClO4]-Typ, mit fehlgeordneten PS2Cl2--Ionen in Punktlagen der Symmetrie 4.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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