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Trans Influence of Triphenylstibine: Crystal Structures of cis ‐[PtBr 2 (SbPh 3 ) 2 ], trans ‐[PtBr(Ph)(SbPh 3 ) 2 ], [NMe 4 ][PtBr 3 (SbPh 3 )], and cis ‐[PtBr 2 (SbPh 3 )(PPh 3 )]
Author(s) -
Sharma P.,
Cabrera A.,
Sharma M.,
Alvarez C.,
Arias J. L.,
Gomez R. M.,
Hernandez S.
Publication year - 2000
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200011)626:11<2330::aid-zaac2330>3.0.co;2-2
Subject(s) - chemistry , cis–trans isomerism , stereochemistry , nuclear magnetic resonance spectroscopy , raman spectroscopy , trans effect , crystal structure , medicinal chemistry , crystallography , physics , optics
Abstract The work reports the unexpected reaction of diphenyldibromo antimonates (III) with PtCl 2 and cis ‐[PtCl 2 (PPh 3 ) 2 ]. The reaction gives triphenylstibine containing Pt II complexes viz. cis ‐[PtBr 2 (SbPh 3 ) 2 ] ( 1 ), trans ‐[[PtBr(Ph)(SbPh 3 ) 2 ] ( 2 ), [NMe 4 ][PtBr 3 (SbPh 3 )] ( 3 ), and cis ‐[PtBr 2 (PPh 3 )(SbPh 3 )] ( 4 ). All the complexes were characterised by elemental analyses, IR, Raman, 195 Pt NMR, FAB mass spectroscopy and X‐ray crystallography. A plausible mechanism via the phenyl migration is proposed for the formation of these complexes. The average Pt–Br distance in 1 is 2.456(2) Å, in 2 2.496 Å(trans to Ph) while in 3 it is 2.476 Å (trans to Sb) implying a comparable trans influence of Ph 3 Sb and Ph 3 P.