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1982 (1)
1Author    Karl-Friedrich Tebbe, Roland FröhlichRequires cookie*
 Title    Beiträge zur Strukturchemie phosphorhaltiger Ketten und Ringe, V [1]  
 Abstract    Die Molekül-und Kristallstruktur des 1.2.3.4-Tetra-ferf-butyl-1.4-bis(trimethylsilyl)tetraphosphans, Me3Si-(«-BuP)4-SiMe3 Structural Chemistry of Phosphorus-Containing Chains and Rings, V [1] Molecular and Crystal Structure of 1,2,3,4-Tetra-ferf-butyl-1,4-bis(trimethylsilyl)tetraphosphane, (H3C)3Si-(f-BuP)4-Si(CH3)3 The compound l,2,3,4-tetra-£er£-butyl-l,4-bis(trimethylsilyl)tetraphosphane, Me3Si-(£-BuP)4-SiMe3, C22H54P4Si2, crystallizes monoclinically in the space group P2i/n (No. 14) with a = 889.9 pm, b = 2292.8 pm, c = 1568.0 pm, ß = 94.14° and Z = 4 formula units. The molecule forms a twisted Si-P4-Si-chain with two kinds of P-P-bonds. The atoms neighbouring the silicium atoms take part in bonds of length d(P-P) = 218.8 pm, whereas the central bond d(P-P) = 221.4 pm is much longer. A special feature of the structure is a short contact d(P-P) = 345.6 pm. Therefore, the inner region of the molecule has the shape of a nearly planar trapezium of the four phosphorus atoms. The periphery of the molecule is as expected. The average bond lengths are d(P-Si) = 228.5 pm, H(P-C) — 190.2 pm, d(Si-C) = 186.6 pm, d(C-C) = 151.8 pm and d(C-H) = 94 pm. 
  Reference    Z. Naturforsch. 37b, 534—541 (1982); eingegangen am 23. Dezember 1981 
  Published    1982 
  Keywords    Tetraphosphane, Phosphorus Chain, Crystal Structure 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0534.pdf 
 Identifier    ZNB-1982-37b-0534 
 Volume    37