Synthesis and Reactivity of Silicon Transition Metal Complexes, 33. Metallo Silanols and Metallo Siloxanes, 8. Metallo‐silanole vom Typ C₅R₅(OC)₂(Me₃P)M—SiPh₂OH (M = Cr, Mo, W): Darstellung nach der Dimethyldioxiran‐Methode und Überführung in funktionalisierte Metallo‐disiloxane

Abstract

Synthesis and Reactivity of Silicon Transition Metal Complexes, 33 32. Mitteilung: Lit. . — Metallo Silanols and Metallo Siloxanes, 8 7. Mitteilung: Lit. . — Metallo Silanols of the Type C 5 R 5 (OC) 2 (Me 3 P)M‐SiPh 2 OH (M = Cr, Mo, W): Preparation According to the Dimethyldioxirane Route and Conversion into Metallo Disiloxanes Herrn Professor Max Schmidt zum 70. Geburtstag gewidmet. The metallo silanes C 5 R 5 (OC) 2 (Me 3 P)M‐SiPh 2 H ( 4a‐c ), are converted into the corresponding metallo silanols C 5 R 5 (OC) 2 ‐(Me 3 P)M‐SiPh 2 OH [R = H, M = Cr ( 6a ); R = Me, M = Mo ( 6b ); M = W ( 6c )] by oxofunctionalization with dimethyldioxirane ( 5 ). Treatment of 6b, c with the chlorosilanes Me 2 Si(R)Cl [R = H ( 3b ), [R = Cl ( 3c )] in the presence of triethylamine gives access to the metallo disiloxanes C 5 Me 5 (OC) 2 (Me 3 P)M‐SiPh 2 OSiMe 2 R (M = Mo, R = H ( 7a ); M = W, R = Cl ( 7b )]. The structure of tungsten silanol 6c is determined by X‐ray diffraction analysis.