SYNTHESIS AND STRUCTURAL STUDIES OF 2-STANNYL-SUBSTITUTED FERROCENYLMETHYLAMINE AND FERROCENYLMETHYLPHOSPHINE DERIVATIVES 2-ME(2)RSNFCCH(2)Y (R=ME, CL-Y=NME(2), PPH(2), P(O)PH(2)FC=C10H8FE)

rimethylstannyl)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 e ther 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 de terminations and multinuclear magnetic resonance studies in solution r eveal for 1b-3b molecular structures in which the tin atom approaches a trigonal bipyramidal pentacoordination as a consequence of an intram olecular Y Sn interaction. The donor strength of Y increases in the or der PPh(2) < NMe(2) < P(O)Ph(2). In solution 1b and 2b undergo ligand- exchange processes.