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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 790-794 
    ISSN: 0044-2313
    Keywords: Diselenium dihalide complexes ; arsenic trihalide and halide ions ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structures of (PPh4)2[As2Se4Cl12] and (PPh4)2[As2Se4Br12]The reaction of PPh4Cl and As2Se3 with SOCl2 or with chlorine in dichloromethane affords (PPh4)2[As2Se4Cl12] with good yields. From PPh4Br, As2Se3 and bromine the corresponding bromo compound was obtained. According to the X-ray crystal structure determinations both compounds are isotypic, crystallizing in the space group of P1. In the anions two Se2X2 molecules are linked with two X- ions forming an Se4X2 ring in chair conformation. Each X--ion is associated with an additional AsX3 molecule (X = Cl, Br).
    Notes: Bei der Umsetzung von PPh4Cl und As2Se3 mit SOCl2 oder mit Chlor in Dichlormethan entsteht (PPh4)2[As2Se4Cl12] in guter Ausbeute. Aus PPh4Br, As2Se3 und Brom entsteht die entsprechende Bromoverbindung. Nach den Röntgenstrukturanalysen kristallisieren beide Verbindungen isotyp in der Raumgruppe P1. Die Anionen können als Assoziate aus je zwei Se2X2-Molekülen und zwei X--Ionen aufgefaßt werden, unter Ausbildung eines Se4X2-Sesselringes; an jedes X--Ion ist noch ein AsX3-Molekül angelagert (X = Cl, Br).
    Additional Material: 2 Ill.
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  • 2
    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.
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  • 3
    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.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 979-981 
    ISSN: 0044-2313
    Keywords: Tetraphenylphosphonium hexathiocyclodiarsenate(III) ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Cyclic Thioarsenate(III) (PPh4)2As2S6The reaction of Na3AsS4 with tetraphenylphosphonium chloride in ethanol or dimethylformamide proceeds with an intramolecular redox reaction, yielding (PPh4)2As2S6. According to its X-ray crystal structure analysis (4071 reflections, R = 0.070) the anion consists of a six-membered ring of two As and four S atoms in the chair conformation. The As atoms occupy the ring positions 1 and 3, and each of them has an additional terminal S atom.
    Notes: Bei der Umsetzung von Na3AsS4 mit Tetraphenylphosphoniumchlorid in Ethanol oder Dimethylformamid tritt eine intramolekulare Redoxreaktion ein, bei der (PPh4)2As2S6 entsteht. Nach der Röntgenstrukturanalyse (4071 beobachtete Reflexe, R = 7,0%) besteht das Anion aus einem sechsgliedrigen Ring aus zwei As und vier S-Atomen in Sesselkonformation; die beiden As-Atome nehmen die Stellungen 1 und 3 ein und tragen jeweils noch ein terminales Schwefelatom.
    Additional Material: 1 Ill.
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  • 5
    ISSN: 0044-2313
    Keywords: Hafnocene monoarsenido complex ; Insertion reactions ; Crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Insertion Reactions of Cp2′HfCl{As(SiMe3)2} (Cp′ = C5H4Me)The reaction of Cp2′HfCl2 (Cp′ = C5H4Me) with Li(THF)2,5As(SiMe3)2 (1 : 1) at room temperature gives the terminal hafnocene arsenido complex Cp2′HfCl{As(SiMe3)2} (1) in high yield. 1 inserts CS2 and PhNC into the Hf—As bond yielding Cp2′HfCl{η2-S2CAs(SiMe3)2} (2) and Cp2′HfCl{η2-N(Ph)CAs(SiMe3)2} (3). The thermally sensitive complexes 1-3 were characterised spectroscopically and crystal structure determinations were carried out on 1 and 3 which shows the η2 bonding mode of the N(Ph)CAs(SiMe3)2 ligand in the latter.
    Notes: Die Reaktion von Cp2′HfCl2 (Cp′ = C5H4Me) mit Li(THF)2,5As(SiMe3)2 (1 : 1) bei Raumtemperatur liefert den terminalen Hafnocen-Monoarsenido-Komplex Cp2′HfCl{As(SiMe3)2} (1) in guter Ausbeute. 1 reagiert mit CS2 oder PhNC unter Insertion in die Hf—As-Bindung und Bildung von Cp2′HfCl{η2-S2CAs(SiMe3)2} (2) und Cp2′HfCl{η2-N(Ph)CAs(SiMe3)2} (3). Die thermisch labilen Verbindungen 1-3 wurden spektroskopisch charakterisiert; an 1 und 3 wurden Röntgenstrukturanalysen durchgeführt. Demnach liegt in 3 ein η2-koordinierter N(Ph)CAs(SiMe3)2-Ligand vor.
    Additional Material: 3 Ill.
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  • 6
    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.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 541-545 
    ISSN: 0044-2313
    Keywords: Dimagnesium trimolybdate(IV) ; molybdenum oxide ; preparation ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: η-Mo4O11 and Mg2Mo3O8: a New Way of Synthesis and Refinement of their Crystal StructuresMg2Mo3O8 was obtained by solid state reaction of MgI2 and MoO3 (1:1) at 200°C and subsequent crystallization at 800°C. Under the same conditions, ZnI2 and MoO3 only yielded rather impure Zn2Mo3O8; however, when ZnI2 or CdI2 and MoO3 were taken in a molar ratio of 1:2, well crystallized η-Mo4O11 was obtained. The known crystal structures of Mg2Mo3O8 and η-Mo4O11 were refined with new X-ray diffraction data (R = 0.030 and 0.059, respectively). The kind of twinning of monoclinic η-Mo4O11 is discussed.
    Notes: Durch Festkörperreaktion von MgI2 und MoO3 (1:1) bei 200°C und anschließender Kristallisation bei 800°C entsteht Mg2Mo3O8. Mit ZnI2 entsteht unter den gleichen Bedingungen nur stark verunreinigtes Zn2Mo3O8; beim Einsetzen von ZnI2 oder CdI2 und MoO3 im Molverhältnis von 1:2 wird dagegen gut kristallisiertes η-Mo4O11 erhalten. Die bekannten Kristallstrukturen von Mg3Mo8O8 und η-Mo4O11 wurden mit neuen Meßdaten verfeinert (R = 3,0 bzw. 5,9%). Die Art der Zwillingsbildung des monoklinen η-Mo4O11 wird diskutiert.
    Additional Material: 2 Ill.
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  • 8
    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.
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  • 9
    ISSN: 0044-2313
    Keywords: Phosphoraneiminato Complexes of Antimony(III) ; Fluoro Complexes ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structures of the Phosphoraneiminato Complexes [SbF2(NPEt3)]2 and [SbF(NPEt3)2]2 as well as of NMe4+SbF4-The title compounds have been prepared from antimony trifluoride with the silylated phosphaneimine Me3SiNPEt3 and [NMe4]F, respectively. They were characterized by IR spectroscopy and by crystal structure determinations.[SbF2(NPEt3)]2: Space group Pbca, Z = 8, structure determination with 1264 unique reflections, R1 = 0.028 for reflections with I 〉 2σ(I). Lattice dimensions at -80°C: a = 1284.8, b = 1162.4, c = 1380.4 pm. The compound forms centrosymmetric dimeric molecules, in which the Ψ-trigonal-bipyramidal coordinated antimony atoms are linked via μ2-N bridges of the NPEt3- ligands.[SbF(NPEt3)2]2: Space group P21/c, Z = 4, structure determination with 2270 unique reflections, R1 = 0.029 for reflections with I 〉 2μ(I). Lattice dimensions at -75°C: a = 815.8, b = 1121.2, c = 2068.5 pm, β = 101.09°. The compound forms centrosymmetric dimeric molecules, in which the Ψ-trigonal-bipyramidal coordinated antimony atoms are linked via μ2-N bridges of one of the two NPEt3- ligands. The other NPEt3- group is terminally connected.NMe4+SbF4-: Space group P21/c, Z = 4, structure determination with 1503 unique reflections, R1 = 0.069 for reflections with I 〉 2μ(I). Lattice dimensions at -50°C: a = 539.80, b = 896.10, c = 1760.3 pm, β = 90.338°. The compound includes monomeric SbF4- ions with distorted Ψ-trigonal-bipyramidal environment of the antimony atoms.
    Notes: Die Titelverbindungen entstehen durch Reaktion von Antimontrifluorid mit dem silylierten Phosphanimin Me3SiNPEt3 bzw. mit Tetramethylammonium-Fluorid. Sie werden IR-spektroskopisch und durch Kristallstrukturanalysen charakterisiert.[SbF2(NPEt3)]2: Raumgruppe Pbca, Z = 8, Strukturlösung mit 1264 unabhängigen Reflexen, R1 = 0,028 für Reflexe mit I 〉 2σ(I). Gitterkonstanten bei -80°C: a = 1284,8; b = 1162,4; c = 1380,4 pm. Die Verbindung bildet zentrosymmetrische dimere Moleküle, in denen die Ψ-trigonal-bipyramidal koordinierten Antimonatome über μ2-N-Brücken der NPEt3--Liganden verknüpft sind.[SbF(NPEt3)2]2: Raumgruppe P21/c, Z = 4, Strukturlösung mit 2270 unabhängigen Reflexen, R1 = 0,029 für Reflexe mit I 〉 2σ(I). Gitterkonstanten bei -75°C: a = 815,8; b = 1121,2; c = 2068,5 pm; β = 101,09°. Die Verbindung bildet zentrosymmetrische dimere Moleküle, in denen die Ψ-trigonal-bipyramidal koordinierten Antimonatome über μ2-N-Brücken eines der beiden NPEt3--Liganden verknüpft sind. Die zweite NPEt3--Gruppe ist terminal gebunden.NMe4+SbF4-: Raumgruppe P21/c, Z = 4, Strukturlösung mit 1503 unabhängigen Reflexen, R1 = 0,069 für Reflexe mit I 〉 2σ(I). Gitterkonstanten bei -50°C: a = 539,80; b = 896,10; c = 1760,3 pm; β = 90,338°. Die Verbindung enthält monomere SbF4--Ionen mit verzerrt Ψ-trigonal-bipyramidaler Umgebung der Antimonatome.
    Additional Material: 4 Ill.
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