Syntheses, Structures, and Spectroscopic Properties of Alkoxide, Hydroxide, and Siloxide Complexes with (r73-Allyl)Mo Moieties

Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany Z. Naturforsch. 54 b, 473-481 (1999); received October 28, 1998 Molybdenum Complexes, Allyl, Alkoxides, Hydroxides, NMR Data Salts with binuclear anions of the general formula [(?73-C3H4R)(CO)2Mo(^-OR')2(/i-OR")Mo(CO)2(f?3-C3H4R ) r (R = h , R',R" = Me, 2 ; R = CH3, R’ = CH(CH3)2, R" = OH, 3; R = CH3, R' = OH, R" = OSiMe3, 4) have been synthesised via reaction of [(r/3-C3H4R)Mo(CO)2(CH3CN)2(thf)]+BF4_ , 1, with NaOMe, NaO'Pr, and KOSiMe3. All products were characterised spectroscopically and investigated by single crystal X-ray analysis. In the case of 3 low temperature 2D-NMR spectra revealed that the solid state structure is maintained in solution and that the compound shows a trigonal twist-rearrangement at room temperature.