Übergangsmetall‐Stannyl Komplexe, 10 [1] . Molybdocen‐ und Wolframocen‐Derivate mit zwei unterschiedlichen Liganden der 4. Hauptgruppe

Transition‐Metal Stannyl Complexes, 10 – Molybdocen and Wolframocen Derivatives with Two Different Main‐Group‐4 Ligands Reactions of Li[Cp 2 MSnPh 3 ] (M Mo, W) with CH 3 I, BuBr, PhCH 2 Br, PhC(O)Cl or Br(CH 2 ) n Br ( n 4,5) yield Cp 2 M(R)SnPh 3 [R CH 3 , Bu, CH 2 Ph, C(O)Ph, (CH 2 ) n Br], while t BuBr or CH 3 C(O)Cl give the hydrido complexes Cp 2 M(H)SnPh 3 . A silyl stannyl complex is only obtained from Li[Cp 2 WSnPh 3 ] and Me 3 SiOSO 2 CF 3 , but not with Me 3 SiCl or from the anionic Mo complex. In contrast, the reactions of chlorostannanes provide the bis(stannyl) complexes Cp 2 M(SnR′ 3 )SnPh 3 or Cp 2 M(SnR′ 2 Cl)SnPh 3 . R/Cl exchange at the tin atom is observed when an excess of the chlorostannane is used. Upon reaction of Li[Cp 2 MSnPh 3 ] with Ph 3 PbCl only Cp 2 M(PbPh 3 )SnPh 3 is formed, while a mixture of Cp 2 M(PbMe 3 )SnPh 3 and Cp 2 M(PbMe 2 Cl)SnPh 3 is obtained with Me 3 PbCl due to redistribution reactions. The structures of Cp 2 W(SnPh 3 )C(O)Ph, Cp 2 W(SnPh 3 )Sn t Bu 2 Cl and Cp 2 W(SnPh 3 )PbMe 2 Cl were determined by X‐ray structure analyses.