Synthesis and Reactivity of Functionalized Dimethylgermyl Complexes of the Formula (5-C5H5)Re(NO)(PPh3)(GeMe2X); Equilibria Involving the Dimethylgermylene Complex [(5-C5H5)Re(NO)(PPh3)(=GeMe2)] TfO
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Addition of Me2GeCl2 to Li+ [(n5 -C5H5)Re(NO)(PPh3)] gives the chiral rhenium dimethylchlorogermyl complex (n5 -C5H5)Re(NO)(PPh3)(GeMe2Cl) (92%), which reacts with LiAlH4 and Me3SiOTf to yield (n5 -C5H5)Re(NO)-(PPh3)(GeMe2H) (74%) and (n5 -C5H5)Re(NO)(PPh3)(GeMe2OTf) (3; 94%), respectively. Reactions of 3 and halide salts give (n5 -C5H5)Re(NO)-(PPh3)(GeMe2X) (X = F, Br, I; 81-83%). All compounds exhibit two 1 H/13 C NMR signals for the diastereotopic GeMe2 groups at amhient temperature, except 3 for which coalescence occurs at 211 K (G = 9. 6 0.2 kcal/mol). This is interpreted as indicating a rapid equilibrium with the dimethylgermylene complex [(n5 -C5H5)Re(NO)(PPh3)(=GeMe2)]+ TfO-. 1994, Taylor & Francis Group, LLC. All rights reserved.
Phosphorus, Sulfur, and Silicon and the Related Elements
author list (cited authors)
Lee, K. E., & Gladysz, J. A.
complete list of authors
Lee, Kenneth E||Gladysz, JA