名称:
Synthesis and structural studies of 2-stannyl-substituted ferrocenylmethylamine and -phosphine derivatives 2-Me2RSnFcCH2Y (RMe, Cl; YNMe2, PPh2, P(O)Ph2; FcC10H8Fe)
摘要:
2-(Trimethylstannyl)ferrocenylmethyldiphenylphosphine, 2-Me(3)SnFcCH(2)PPh(2) (2a), was synthesized from 2-Me(3)SnFcCH(2)NMe(2) (1a) and Ph(2)PH. Compound 2a is oxidized with H2O2 to 2-Me(3)SnFcCH(2)P(O)Ph(2) (3a). Halogenation of la and 2a with Me(2)SnCl(2) and 3a with HCl-diethyl ether yields the organotin monochlorides 2-Me(2)(Cl)SnFcCH(2)Y (1b, Y = NMe(2); 2b, Y = PPh(2); 3b, Y = P(O)Ph(2)). Both crystal structure determinations and multinuclear magnetic resonance studies in solution reveal for 1b-3b molecular structures in which the tin atom approaches a trigonal bipyramidal pentacoordination as a consequence of an intramolecular Y Sn interaction. The donor strength of Y increases in the order PPh(2) < NMe(2) < P(O)Ph(2). In solution 1b and 2b undergo ligand-exchange processes.