Carbon monoxide cleavage by (silox) 3Ta (silox= tert-Bu3SiO-): physical, theoretical, and mechanistic investigations

DR Neithamer, RE LaPointe, RA Wheeler…

Index: Neithamer, David R.; LaPointe, Robert E.; Wheeler, Ralph A.; Richeson, Darrin S.; Duyne, Gregory D. Van; Wolczanski, Peter T. Journal of the American Chemical Society, 1989 , vol. 111, # 25 p. 9056 - 9072

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Citation Number: 164

Abstract

Abstract: Reduction of (silox), TaCIZ (1, silox='Bu3SiO-) with Na/Hg in THF leads to a three- coordinate, Ta (II1) siloxide,(silox), Ta (2). Derivatization of 2 with excess 0, or H, provides (silox), Ta= O (3) and (silox), TaH2 (4), respectively. At 25 OC, carbonylation of 2 (0.1-1.0 atm) generates l/, 3 and 1/4 [(silo~) 3Talz (p-C2)(9, consistent with a CO uptake of 0.47 equiv. X-ray (Pi, R= 9.6%) structural, IR, and Raman studies of dicarbide 5 manifest a near ...