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- W2087461567 abstract "BrSn[Mn(Co)5]3 besitzt am Sn(IV)-Atom ein verzerrtes Tetraeder: MnSnMn-Winkel (Mittel) = 116,41(5)° und BrSnMn (Mittel) = 101,05(4)°. Die unterschiedlichen SnMn-Bindungsabstände (273,9(2) pm; 272,2(2) pm; 275,8(2) pm); resultieren wahrscheinlich aus der intramolekularen Wechselwirkung der sperrigen Mn(CO)5-Liganden. Das zentrale Molekülfragment von Mn2(CO)8[μ-Sn(CI)Mn(CO)5]2 besteht aus einem planaren Mn2Sn2-Rhombus, der quer durch den Ring eine MnMnBindung von 309, 1(1) pm enthält. Neben den beiden Mn-Ringatomen ist jedes Sn(IV)-Atom mit einem Br- und Mn(CO)5-Liganden verknüpft; das Koordinationspolyeder am Sn(IV) ist verzerrt tetraedrisch. Die terminalen Liganden von Mn2(CO)8 [μSn(CI)Mn(CO)5]2 befinden sich in trans-Stellung zum Mn2Sn2-Rhombus. Die mittleren Bindungsabstände betragen: SnMn = 262,4(1) pm; SnCI = 240,3(1) pm; MnC = 184,1(5) pm, sowie-C-O = 113,5(6). Die Faktoren mit Einfluß auf die Geometrie solcher Mn2M2-Rhomben (M = Hauptgruppenmetall) werden behandelt. Single Crystal X-Ray Analysis of Compounds with a Covalent Metal-Metal Bond. VI. Crystal and Molecular Structure of Bromotin(IV)-tris(pentacarbonyl manganese) and Octacarbonylbis[μ-chloro-tin(IV)-(pentacarbonyl manganese)] dimanganese (Mn-Mn) BrSn[Mn(CO)5]3 shows around the SnIV atom a distorted tetrahedron: MnSnMn angle (average) = 116.41(5)° and BrSnMn (average) = 101.05(4)°. The signifiquant different SnMn bond distances (273.9(2) pm; 272.2(2) pm; 275.8(2) pm) are probably a consequence of the intramolecular interaction of the three bulky Mn(CO)5 ligands. In Mn2(CO)8[μ-Sn(Cl)Mn(CO)5]2 the central molecule fragment contains a planar Mn2Sn2 rhombus with a MnMn bond (309.1(1) pm) across the metal ring. Each of the SnIV atoms is connected with a Br and a Mn(CO)5 ligand as well as to both of the Mn ring atoms; the coordination polyhedron around the SnIV atom is a distorted tetrahedron. The terminal ligands in Mn2(CO)8[μ-Sn(CI)Mn(CO)5]2 are in transposition with respect to the ring. The mean values for the remaining bond distances are: SnMn = 262.4(1) pm; SnCl = 240.3(1) pm; MnC = 184.1(5) pm; SnCI = 240.3(1) pm; MnC = 184.1(5) pm and CO = 113.5(6) pm. The factors with an influence on the geometrical shape of such Mn2M2 rings (M = main group metal) are discussed." @default.
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- W2087461567 date "1978-11-01" @default.
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- W2087461567 title "Einkristall- R�ntgenstrukturanalysen an Verbindungen mit kovalenter Metall-Metall-Bindung.VI. Die kristall-und Molek�lstruktur von Bromozinn(IV)-tris(pentacarbonylmangan) und Octacarbonylbis[?-chlorozinn(IV)-(pentacarbonylmangan)]di mangan (Mn - Mn)" @default.
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- W2087461567 doi "https://doi.org/10.1002/zaac.19784460111" @default.
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