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Synthesis and a crystal structure analysis of mixed bis(phosphino)methanide/phosphonium bis(methylide) complexes of nickel, palladium, and platinum
Author(s) -
Bassett JeanMarie,
Mandl Johann R.,
Schmidbaur Hubert
Publication year - 1980
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19801130335
Subject(s) - chemistry , phosphonium , ylide , crystal structure , platinum , triphenylphosphine , stereochemistry , palladium , medicinal chemistry , double bond , nickel , crystallography , polymer chemistry , catalysis , organic chemistry
Abstract From bis(diphenylphosphino)methanide complexes of the type {[(C 6 H 5 ) 2 P] 2 CH} 2 M (M = Ni, Pd, Pt), and an equivalent amount of an ylide R 2 (CH 3 )P CH 2 (R = CH 3 , C 2 H 5 ), the three title complexes {[(C 6 H 5 ) 2 P] 2 CH}M[(CH 2 ) 2 PR 2 ] ( 5a – c ) have been prepared. CH 2 [P(C 6 H 5 ) 2 ] 2 is the by‐product of the reaction. An X ‐ray diffraction study of the platinum compound 5c revealed a mixed chelate structure with a planar bis(phosphino)methanide and a folded ylide ring. The central carbon of the bis(phosphino)methanide is not in close contact with the metal. Its distances to the phosphorus atoms indicate significant double bond character, some of which is also retained in the phosphonium bis(methylide) group.