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  • 1
    ISSN: 0044-2313
    Keywords: Phosphorane Iminato Complexes of Antimony ; 121Sb Mössbauer Spectra ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phosphorane Iminato Complexes of Antimony. The Crystal Structures of [Sb2Cl5(NPMe3)2][SbCl6] · CH3CN and [SbCl(NPPh3)]2[SbCl6]2 · 6 CH3CNThe title compounds are formed by reaction of antimony pentachloride in acetonitrile solution with the phosphorane iminato complexes SbCl2(NPMe3) and SbCl2(NPPh3), respectively, which themselves are synthesized by reaction of antimony trichloride with Me3SiNPR3 (R = Me, Ph). The complexionic compounds are characterized by 121Sb Mössbauer spectroscopy and by crystal structure determinations.[Sb2Cl5(NPMe3)2][SbCl6] · CH3CN: Space group P41, Z = 4, 3 698 observed unique reflections, R = 0.022. Lattice dimensions at -60°C: a = b = 1 056.0(1), c = 2 709.6(2) pm. The structure consists of SbCl6- ions and cations [Sb2Cl5(NPMe3)2(CH3CN)]+, in which one SbIII atom and one SbV atom are bridged by the N atoms of the phosphorane iminato ligands.[SbCl(NPPh3)]2[SbCl6]2 · 6 CH3CN: Space group P1, Z = 2, 5 958 observed unique reflections, R = 0.033. Lattice dimensions at -60°C: a = 989.4(11), b = 1 273(1), c = 1 396(1) pm, α = 78.33(7), β = 77.27(8)°, γ = 86.62(8)°. The structure consists of SbCl6- ions and centrosymmetric cations [SbCl(NPPh3)(CH3CN)2]22+, in which the antimony atoms are bridged by the N atoms of the phosphorane iminato ligands.
    Notes: Die Titelverbindungen entstehen durch Reaktion von Antimonpentachlorid in Acetonitrillösungen mit den Phosphaniminatokomplexen SbCl2(NPMe3) bzw. SbCl2(NPPh3), die ihrerseits aus Antimontrichlorid und Me3SiNPR3 (R = Me, Ph) hergestellt werden. Die ionisch aufgebauten Komplexe werden durch ihre 121Sb-Mößbauer-Spektren und durch Kristallstrukturanalysen charakterisiert.[Sb2Cl5(NPMe3)2][SbCl6] · CH3CN: Raumgruppe P41, Z = 4, 3 698 beobachtete unabhängige Reflexe, R = 0,022. Gitterabmessungen bei -60°C: a = b = 1 056,0(1); c = 2 709,6(2) pm. Die Struktur wird aus SbCl6--Ionen und Kationen [Sb2Cl5(NPMe3)2(CH3CN)]+ gebildet, in denen ein SbIII- und ein SbV-Atom über die N-Atome der Phosphaniminatoliganden verknüpft sind.[SbCl(NPPh3)]2[SbCl6]2 · 6 CH3CN: Raumgruppe P1, Z = 2, 5 958 beobachtete unabhängige Reflexe, R = 0,033. Gitterkonstanten bei -60°C: a = 989,4(11); b = 1 273(1); c = 1 396(1) pm; α = 78,33(7)°; β = 77,27(8)°; γ = 86,62(8)°. Die Verbindung besteht aus SbCl6--Ionen und zentrosymmetrischen Kationen [SbCl(NPPh3)(CH3CN)2]22+, in denen die beiden Antimonatome über die N-Atome der Phosphaniminatoliganden verknüpft sind.
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  • 2
    ISSN: 0044-2313
    Keywords: Polytellurides ; Syntheses ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structures of the Polytellurides [Ca(DMF)6]Te4, [Sr(15-Crown-5)2]Te4 · H2O, {[BaCl(18-Crown-6)(DMF)2]2[BaCl(18-Crown-6)(DMF) (H2O)]2(Te4)2}, and [Ph3PNPPh3]2Te5 · 2 DMFThe title compounds were formed by alkalimetal polytelluride solutions in dimethylformamide (DMF) in the presence of the corresponding counter ions as well as in the presence of 15-crown-5 or 18-crown-6. Single crystals were obtained upon using additional diethylether.[Ca(DMF)6]Te4: Space group C2/c, Z = 4, 1024 observed unique reflections, R = 0.055. Lattice dimensions at -70°C: a = 1776.1; b = 813.0 c = 2545.9pm; β = 102.90°. The compound consists of centrosymmetric [Ca(DMF)6]2+ ions, in which the calcium ions are octahedrally coordinated by the six oxygen atoms of the DMF molecules, and chain-like Te42-[Sr)15-crown-5)2]Te4 · H2O: Space group C2/c, Z = 4, 3322 observed unique reflections, R = 0.058. Lattice dimensions at -70°C: a = 1450.5; b = 1407.3; c = 1660.9 pm; β = 110.22°. The compounds forms centrosymmetric cations [Sr(15-crown-5) 2]2+, in which the Sr2+ ion is sandwich-like surrounded by the ten oxygen atoms of the crown ether molecules, and chain-like Te42- ions, which are associated in the lattice forming polymeric chains.{[BaCl(18-crown-6)(DMF) 2]2[BaCl(18-crown-6)(DMF)· (H2O)] 2(Te4)2}: Space group P1, Z = 1, 3189 observed unique reflections, R = 0.054. Lattice dimensions at 19°C: a = 986.1; b = 1052.8; c = 2696.4 pm; α = 89.34°; β = 88.68°; γ = 89.56°. The compound consists of chain-like Te42- ions without symmetry and of the two somewhat different cations [BaCl(18-crown-6)(DMF) 2]22+, in which the Ba2+ ions dimerize via centroysmmetric rings. Along with the six oxygen atoms of the crown ether molecules and the oxygen atoms of the DMF molecules, the oxygen atoms of the DMF and water molecule, respectively, the Ba+ ions achieve coordination number ten.[Ph3PNPPh3]2Te5 · 2DMF: Space group Pc, Z = 2, 5971 observed unique reflections, R = 0.058. Lattice dimensions at 20°C: a = 20°C: a = 1085.2; b = 1287.0; c = 2715.9 pm; β = 90.19°. The compounds consists of [Ph3PNPPh3]+ ions, chain-like Te52- ions, and incorporate DME molecules without bonding interaction. The 52- ions are associate via polymeric chains in which left- and right handed individuals are alternating.
    Notes: Die Titelverbindungen entstehen aus Alkalipolytelluridlösungen in Dimethylformamid (DMF) in Gegenwart der entsprechenden Gegenionen und der Kronenether 15-Krone-5 bzw. 18-Krone-6. Einkristalle werden durch Zusatz von Diethylether gebildet.[Ca(DMF)6]Te4: Raumgruppe C2/c, Z = 4, 1024 beobachtete unabhängige Reflexe, R = 0,055. Gitterabmessungen bei -70°C: a =1 776,1; b =813,0; c = 2 545,9 pm; β = 102,90°. Die Verbindung besteht aus zentrosymmetrischen Kationen [Ca(DMF)6]2+, in denen die Calciumionen oktaedrisch von den sechs O-Atomen der DMF-Moleküle umgeben sind, und Te42--Ionen mit Kettenstruktur.[Sr(15-Krone-5)2]Te4 · H2O: Raumgruppe C2/c, Z = 4, 3322 beobachtete unabhängige Reflexe, R = 0,058. Gitterabmessungen bei -70°C: a = 1 450,5; b = 1 407,3; c = 1 660,9 pm; β = 110,22°. Die Verbindung bildet Kationen [Sr(15-Krone-5)2]2+, in denen das Strontiumion zentrosymmetrisch und sandwichartig von den zehn O-Atomen der beiden Kronenethermoleküle umgeben ist, sowie kettenförmigen Te42--Ionen, die im Gitter zu polymeren Tellursträngen assoziiert sind.{[BaCl(18-Krone-6)(DMF)2]2[BaCl(18-Krone-6)(DMF)· (H2O)]2(Te4)2}: Raumgruppe P1, Z = 1, 3189 beobachtete unabhängige Reflexe, R = 0,054. Gitterabmessungen bei 19°C: a = 986,1; b = 1 052,8; c = 2 696,4 pm; α = 89,34°; β = 88,68°; γ= 89,56°. Die Verbindung besteht aus kettenförmigen Tetratelluridionen ohne Symmetrie und den beiden etwas verschiedenen Kationen [BaCl(18-Krone-6)(DMF)2]22+ und [BaCl(18-Krone-6)(DMF)(H2O)]22+. In diesen sind die Bariumionen zentrosymmetrisch über BaCl2Ba-Brücken dimerisiert, wodurch die Ba2+-Ionen mit den sechs O-Atomen des Kronenethers und den O-Atomen der DMF-Moleküle bzw. denen des DMF- und des H2O-Moleküls die Koordinationszahl zehn erreichen.[Ph3PNPPh3]2Te5 · 2 DMF: Raumgruppe Pc, Z = 2, 5971 beobachtete unabhängige Reflexe, R = 0,058. Gitterabmessungen bei 20°C: a = 1 085,2; b = 1 287,0; c = 2 715,9 pm; β = 90,19°. Die Verbindung besteht aus [Ph3PNPPh3]+-Ionen, kettenförmigen Pentatelluridionen und eingelagerten DMF-Molekülen ohne bindende Wechselwirkung. Die Te52--Ionen sind zu unendlichen Ketten assoziiert, wobei links- und rechtsdrehende Individuen einander abwechseln.
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  • 3
    ISSN: 0044-2313
    Keywords: Phosphorane Iminato Complexes of Selenium ; Chloroselenates(II) ; Syntheses ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phosphorane Iminato-Trichloroselenates(II): Syntheses and Crystal Structures of [SeCl(NPPh3)2]+SeCl3- and [Me3SiN(H)PMe3]2+[Se2Cl6]2-[SeCl(NPPh3)2]+SeCl3- has been synthesized by the reaction of Se2Cl2 with Me3SiNPPh3 in acetonitrile solution, forming orangered crystals, whereas red crystals of [Me3SiN(H)PMe3]2+[Se2Cl6]2- were obtained by the reaction of Me3SiNPMe3 with SeOCl2 in acetonitrile solution. Both complexes were characterized by X-ray structure determinations.[SeCl(NPPh3)2]+SeCl3-: Space group P21/n, Z = 4, structure solution with 7 489 observed unique reflections, R = 0.057. Lattice dimensions at -60°C: a = 1 117.0; b = 2 241, c = 1 407.5 pm, β = 95.61°. In the cation [SeCl(NPPh3)2]+ the selenium atom is ϕ-tetrahedrally coordinated by the chlorine atom and by the nitrogen atoms of the phosphorane iminato ligands, whereas the anion SeCl3- has a T-shaped structure with ϕ-trigonal-bipyramidale surrounding of the selenium atom.[Me3SiN(H)PMe3]2+[Se2Cl6]2-: Space group P21/c, Z = 4, structure solution with 2 093 observed unique reflections, R = 0.080. Lattice dimensions at -70°C: a = 956, b = 828, c = 1 973 pm, β = 93.80°. The structure consists of [Me3SiN(H)PMe3]+ ions and planar [Se2Cl6]2- anions, in which the selenium atoms are bridged nearly symmetrically by two chlorine atoms.
    Notes: [SeCl(NPPh3)2]+SeCl3- entsteht in Form orangeroter Kristalle bei der Reaktion von Se2Cl2 mit Me3SiNPPh3 in Acetonitrillösung, während [Me3SiN(H)PMe3]2+[Se2Cl6]2- als rote Kristalle durch Einwirkung von Me3SiNPMe3 auf SeOCl2 in Acetonitrillösung gebildet wird. Beide Verbindungen wurden kristallographisch charakterisiert.[SeCl(NPPh3)2]+SeCl3-: Raumgruppe P21/n, Z = 4, Strukturlösung mit 7 489 beobachteten unabhängigen Reflexen, R = 0,057. Gitterabmessungen bei -60°C: a = 1 117,0; b = 2 241; c = 1 407,5 pm, β = 95,61°. In dem Kation [SeCl(NPPh3)2]+ ist das Selenatom ϕ-tetraedrisch von dem Chloratom und von den N-Atomen der beiden Phosphaniminatoliganden umgeben, während das Anion SeCl3- T-förmige Gestalt hat mit ϕ-trigonal-bipyramidaler Umgebung des Selenatoms.[Me3SiN(H)PMe3]2+[Se2Cl6]2-: Raumgruppe P21/c, Z = 4, Strukturlösung mit 2 093 beobachteten unabhängigen Reflexen, R = 0,080. Gitterabmessungen bei -70°C: a = 956; b = 828; c = 1 973 pm, β = 93,80°. Die Struktur besteht aus [Me3SiN(H)PMe3]+-Ionen und planaren Anionen [Se2Cl6]2-, in denen die Selenatome über nahezu symmetrische Chlorobrücken zentrosymmetrisch verknüpft sind.
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  • 4
    ISSN: 0044-2313
    Keywords: Alkoxy-Alkyne Complexes of Tungsten ; Synthesis ; 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 Tungsten(VI)-alkyne Complexes [W2(O)(OMe)6(Et—Se—C≡C—Se—Et)2] and Li[W(OMe)5(Et—Te—C≡C—Te—Et)]The title compounds have been prepared by reactions of lithium methanolate with [WCl4(Et—Se—C≡C—Se—Et)(THF)] and [WCl4(Et—Te—C≡C—Te—Et)(THF)], respectively, in diethylether suspensions. Both complexes were characterized by crystal structure determinations.[W2(O)(OMe)6(Et—Se—C≡C—Se—Et)2]: Space group P1, Z = 2, structure determination with 4 320 observed unique reflections, R = 0.041. Lattice dimensions at -70°C: a = 949.3, b = 1 225.3, c = 1 285.0 pm, α = 82.48°; γ = 82.44°; β = 81.44°. The tungsten atoms are bridged by three μ2-O-atoms of the OMe groups; the alkyne ligands are coordinated side-on in a metallacyclopropene-like fashion.Li[W(OMe)5(Et—Te—C≡C—Te—Et)]: Space group P1, Z = 2, structure determination with 9 381 observed unique reflections, R = 0.038. Lattice dimensions at -70°C: a = 983.4, b = 1606.9, c = 1971.5 pm, α = 66.09°, β = 84.29°, γ = 79.83°. The lithium ions link the [W(OMe)5(Et—Te—C≡C—Te—Et)]- anions to a trimeric ion ensemble via the O atoms of three OMe groups of each anion.
    Notes: Die Titelverbindungen werden durch Reaktion von Lithiummethanolat mit [WCl4(Et—Se—C≡C—Se—Et)(THF)] bzw. mit [WCl4(Et—Te—C≡C—Te—Et)(THF)] in Diethylether hergestellt und durch Kristallstrukturanalysen charakterisiert.[W2(O)(OMe)6(Et—Se—C≡C—Se—Et)2]: Raumgruppe P1, Z = 2, Strukturlösung mit 4 320 beobachteten unabhängigen Reflexen, R = 0,041. Gitterabmessungen bei -70°C: a = 949,3; b = 1225,3; c = 1285,0 pm, α = 82,48°; β = 82,44°; γ = 81,44°. Die beiden Wolframatome sind über drei μ2-OMe-Brücken verknüpft; die Alkinliganden sind seitlich entsprechend von Metallacyclopropengruppen koordiniert.Li[W(OMe)5(Et—Te—C≡C—Te—Et)]: Raumgruppe P1, Z = 2, Strukturlösung mit 9 381 beobachteten unabhängigen Reflexen, R = 0,038. Gitterabmessungen bei -70°C: a = 983,4; b = 1606,9; c = 1971,5 pm, α = 66,09°; β = 84,29°; β = 79,83°. Die Lithiumionen verknüpfen die [W(OMe)5(Et—Te—C≡C—Te—Et)]--Anionen über die O-Atome dreier OMe-Gruppen zu einem trimeren Ionenensemble.
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