185321-36-2Relevant academic research and scientific papers
Influence of ancillary ligands in the coordination mode of P and As carbonyl stabilized ylides on Pt(II) systems. X-ray structure of trans-[Pt(PPh3)2(CF3){OC(OCH 3)=C(H)(PPh3)}][BF4]·0.5CH 2Cl2
Belluco, Umberto,Michelin, Rino A.,Bertani, Roberta,Facchin, Giacomo,Pace, Giuseppe,Zanotto, Livio,Mozzon, Mirto,Furlan, Michela,Zangrando, Ennio
, p. 355 - 366 (2008/10/08)
The carbonyl stabilized P and As ylides Ph3PCHCOR (R = CH3, Ph, OCH3) and Ph3AsCHCOR (R = CH3, Ph, OCH3) have been reacted with some platinum(II) complexes bearing ancillary ligands with different steric hindrance, in order to determine the factors that influence the C-versus O-coordination mode of the ylides. Thus, the reactions of [(dppe)PtCl2] and [(dppv)PtCl2] with Ph3PCHCOR (R = CH3, Ph) give the O-coordinated complexes, while with Ph3PCHCOOCH3 they give the corresponding C-coordinated derivatives. The reactions of trans-[(PPh3)2(CF3)Pt(solv)]+BF 4- yield the O-coordinated compounds and the reactions with [Pt(C3H5)Cl]4 give selectively the C-coordinated derivatives as well as the reactions with the dimer [PtCl{P(Bu1)2C(Me)2CH2}] 2. The derivative trans-[Pt(PPh3)2(CF3){OC(OCH 3)=C(H)(PPh3)}][BF4] crystallizes in the triclinic space group P1? (No. 2), a = 10.385(4), b = 14.844(5), c = 18.511(6) ?, α = 96.46(2), β = 99.79(2), γ = 97.00(2)°, V = 2765(1) ?3, Z = 2. The values of coordination distances and of the Pt-O-C angle appear influenced by steric factors.
