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

Synthesis and Reactivity of Silicon Transition Metal Complexes, 331 . — Metallo Silanols and Metallo Siloxanes, 82 . — Metallo Silanols of the Type C5R5(OC)2(Me3P)M-SiPh2OH (M = Cr, Mo, W): Preparation According to the Dimethyldioxirane Route and Conversion into Metallo Disiloxanes3 The metallo silanes C5R5(OC)2(Me3P)M-SiPh2H (4a-c), are converted into the corresponding metallo silanols C5R5(OC)2-(Me3P)M-SiPh2OH [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 Me2Si(R)Cl [R = H (3b), [R = Cl (3c)] in the presence of triethylamine gives access to the metallo disiloxanes C5Me5(OC)2(Me3P)M-SiPh2OSiMe2R (M = Mo, R = H (7a); M = W, R = Cl (7b)]. The structure of tungsten silanol 6c is determined by X-ray diffraction analysis.