Synthesis, Structure, and Reactivity of Chiral Rhenium Amido Complexes of the Formula (η5‐C5H5)Re(NO)(PPh3)(NRR') Academic Article uri icon

abstract

  • Reactions of primary and secondary amine complexes [(η5‐C5H5)Re(NO)(PPh3)(NHRR')]+ TfO− [2; R/R' = H/H (a), H/CH3 (b), H/C6H5 (d), CH3/CH3 (f), CH2CH2CH2CH2 (h)] with nBuLi give amido complexes (η5‐C5H5)Re(NO)(PPh3)(NRR') (1) in quantitative NMR yields. Although 1 d can be isolated in pure form, 1 f is converted upon workup into a dimeric bridging bis(amido) complex, cis‐[(η5‐C5H5)Re(NO){μ‐N(CH3)2}]2. The crystal structure of 1 d exhibits a pyramidal amido nitrogen atom. The diastereotopic methyl groups in 1 f readily exchange, as assayed by variable‐temperature NMR. Complexes 1 a, f react with TfOH to regenerate 2a, f, and with TfOR” to give the corresponding alkylated amine complexes. The basicities and nucleophilicities of the amido nitrogen atoms are shown to be greater than those of organic amines. Copyright © 1992 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

author list (cited authors)

  • Dewey, M. A., Knight, D. A., Arif, A., & Gladysz, J. A.

citation count

  • 27

publication date

  • April 1992

publisher