Struktur und Farbigkeit von P,P′-Tetra- t -butyl-und P, P′-Tetraphenyl-oxalsäurediphosphid und Derivaten

摘要: The unexpected violet colour of P,P′-tetraphenyl-oxalic acid diphosphide (3) stimulated the synthesis following derivatives: P,P′-tetra-t-butyl-oxalic (2), N,P-tetraphenyl-oxalic amide phosphide (4) and P, α-triphenyl-glyoxylic (5). compounds could be prepared by reaction corresponding acyl chlorides with diorganyl-(trimethylsilyl) phosphine; (organyl=t-butyl phenyl). electronic transitions green-blue2 red5 in 450–700 nm region are discussed, also theirv C=O ir spectrum. These results interpreted connection molecule structures of2 and3 which have been determined X-ray crystal structure analysis. In2 framework P−C(O)−C(O)−P is only slightly distorted from a coplanartrans-position, in3 somewhat more. bonds at P expected pyramidal arrangement. direction lone pairs P-atoms, derived this bond arrangement, discussed respect to phosphides.