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'Long Endocyclic C C Bond' in keywords
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1978 (1)
1Author    W. S. Sheldrick, J. A. Gibson, G.-V RöschenthalerRequires cookie*
 Title    The Crystal Molecular Structure of the Adduct of 2,2,2-Trifluoro-4,4,5,5-tetrakis(trifluoromethyl)-l,3,2A 5 -dioxaphospholane with Trimethylphosphine. A Strong P —» P Coordinate Bond  
 Abstract    The adduct of 2,2,2-trifluoro-4,4,5,5-tetrakis(trifluoromethyl)-1,3,2 A 5 -dioxaphospholane with trimethylphosphine crystallises in the orthorhombic space group Pbcm, Z = 4, with a — 11.018(2), b — 12.978(4), c= 11.607(2) A at —120 °C. The perfluoropinacolyl ring system lies in a crystallographic plane of symmetry. This ring conformation and the very long endocyclic C-C bond and average C-CF3 distances of respectively 1.59(1) and 1.59(1) A are presumably a consequence of very short F---F steric contacts. The P->P bond distance of 2.234(5) is very short for a coordinate bond being only 0.01-0.03 A longer than that typically observed for a a-bond. The tr-bond lengths to the hexacoordinate phosphorus are influenced by the nature of the Zrans-bond in the octahedron. 
  Reference    Z. Naturforsch. 33b, 1102—1 (1978); eingegangen am 22. Juni 1978 
  Published    1978 
  Keywords    X-ray, Hexacoordinate Phosphorus Adduct, Coordinate P-*P Distance Planar Perfluoropinacolyl Ring System, Long Endocyclic C-C Bond 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1102.pdf 
 Identifier    ZNB-1978-33b-1102 
 Volume    33