Preparation, structure and reactivity of (η6-1-triphenylstannylbenzene)(η5-cyclopentadienyl) iron(II) hexafluorophosphate

Abstract A novel organotin compound containing a C 5 H 5 Fe+C 6 H 5 ligand has been synthesized. (η 6 -Triphenylstaannylbenzene)(η 5 -cyclopentadienyl)iron(II) hexafluorophosphate was prepared by treating Ph 3 SnLi with (η 6 -chlorobenzene)(η 5 -cyclopentadienyl)iron(II) hexafluorophosphate in THF at room tempeature . 1 H, 13 C and 119 Sn NMR shifts are reported. The 119 Sn shift of -132 ppm is very close to that of Ph 4 Sn indicating that the C 5 H 5 Fe+C 6 H 5 ligand has only a small effect. 57 Fe and 119 Sn Mossbauer data also given. The 57 Fe data show a reduced quarupole splitting compared with the parent benzene complex, indicative of electron withdrawal by the Ph 3 Sn moiety. The 119 Sn data are notable for the appearance of a small quadrupole splitting (0.49 mms−1); this splitting is probably due to a combination of steric and polar effects. The complex reacted with HgCl 2 in acetone to give PhHgCl. Quenching the residual filtrate in KI gave the new complex (η 6 -diphenyliodostannylbenzene)(η 5 -cyclopentadienyl)iron(II) tetraiodomercurate. Reaction with iodine also resulted in displacement of the non-complexed phenyl groups.