Organoruthenium Complexes Containing New Phosphorus–Carbon and Phosphorus–Carbon–Sulfur Ligands Generated in the Coordination Sphere by Nucleophilic Addition Reactions
摘要:
The reaction of the dimeric complex [RuCl(mu-Cl)(eta(6)-C10H14)](2) (C10H14 = p-cymene) with an excess of allyldiisopropylphosphane (ADIP) leads to the complex [RuCl(eta(6)-C10H14)(kappa(2)(P,C)-iPr(2)PCH(2)CH(iPr(2)PCH(2)CH=CH2)CH2}](+) (1(+)), which presents a new bidentate kappa(2)(P,C) ligand. The same cationic complex can be prepared by nuclephilic attack of 1 equiv of the free ADIP at the coordinated kappa(3)(P,C,C)-iPr(2)PCH(2)CH=CH2 ligand in [RuCl(eta(6)-C10H14){kappa(3)(P,C,C)-iPr(2)PCH(2)CH=CH2}](+) (3(+)). Addition of different phosphane ligands to complex 3(+) allows to the synthesis of ruthenium complexes with new bidentate ligands kappa(2)(P,C). The unusual complexes [Ru{kappa(3)(P,C,S)-iPr(2)PCH(2)CH(SR)CH2}(eta(6)-C10H14)](+) (11a-c(+)) containing new kappa(3)(P,C,S) ligands can be obtained by the reaction of 3(+) with anionic nucleophiles RS-. For comparative purposes, the indenyl complex [Ru(eta(5)-C9H7){kappa(3)(P,C,C)-iPr(2)PCH(2)CH=CH2}(PPh3)](+) (8(+)) has been also prepared and differences in the reactivities of cationic complexes 3(+) and 8(+) toward nucleophiles are pointed out.