期刊
ORGANOMETALLICS
卷 28, 期 18, 页码 5489-5492出版社
AMER CHEMICAL SOC
DOI: 10.1021/om9004498
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The air- and water-tolerant hydroxy-bridged rhodium dimer (COD)Rh(mu(2)-OH)](2) cleanly activates the aliphatic C-H bond in indene to generate [(COD)Rh(eta(3)-indenyl)]. The mechanism involves direct coordination of indene to the dimer followed by rate-determining C-H bond cleavage, in contrast to the previously reported analogous reactions of [(diimine)M(mu(2)-OH](2)(2+) (M = Pd, Pt), for which the dimer must be cleaved before rate-determining displacement of solvent by indene. Another difference is observed in the reactions with indene in the presence of acid: the Rh system generates a stable eta(6)-indene 18-electron cation, [(COD)Rh(eta(6)-indene)](+), that is not available for Pd and Pt, which instead form the eta(3)-indenyl C-H activation products. The crystal structure of [(COD)Rh (eta(6)-indene)] is reported.
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