Reactions of R2P-P(SiMe3)Li with [(R ' P-3)(2)PtCl2]. A general and efficient entry to phosphanylphosphinidene complexes of platinum. Syntheses and structures of [(eta(2)-P=(PPr2)-Pr-i)Pt(p-Tol(3)P)(2)], [(eta(2)-P=(PBu2)-Bu-t)Pt(p-Tol(3)P)(2)], [{et

摘要

The reactions of lithium derivatives of diphosphanes R2P-P(SiMe3)Li (R = Bu-t, Pr-i, Et2N and (Pr2N)-Pr-i) with [(R'P-3)(2)PtCl2] (R'(3) P = Et3P, Et2PhP, EtPh2P and p-Tol(3)P) proceed in a facile manner to afford side-on bonded phosphanylphosphinidene complexes of platinum [(eta(2)-P=PR2) Pt(PR'(3))(2)]. The related reactions of Ph2P-P(SiMe3)Li with [(R'P-3)(2)PtCl2] did not yield [(eta(2)-P=PPh2)Pt(PR'(3))(2)] and resulted mainly in the formation of [{(R'P-3)(2)Pt} P-2(2)], Ph2P-PLi-PPh2, (Me3Si)(2) PLi and (Me3Si)(3)P. Crystallographic data are reported for the compounds [(eta(2)-P=PR2)Pt(p-Tol(3)P)(2)] (R= Bu-t, Pr-i, ((Pr2N)-Pr-i)(2)P) and for [{(Et2PhP)(2)Pt}(2)P-2].