Syntheses of kinetically unstable neutral formyl complexes via Li(C2H5)3BH and "transformylation" reactions of metal carbonyl cations
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Low-temperature syntheses of the kinetically unstable formyls (η-C5H5)Re(NO)(CO)(CHO) (9), (ηC5H5)Mn(NO)(CO)(CHO) (10), Re(PPh3)(CO)4(CHO) (11), Mn(PPh3)2(CO)3(CHO) (12), Ir(PPh3)2(CO)2(CHO) (13), and (η-C5H5)Mo(PPh3)(CO)2(CHO) (14) by reaction of Li(C2H5)3BH with the corresponding metal carbonyl cations are described. Formyls 9, 10, and 11 can also be synthesized by hydride transfer from the stable neutral formyl (η-C5H5)Re(NO)(PPh3)(CHO) (1) to the appropriate metal carbonyl cation precursor (“transformylation”); this procedure avoids formation of byproduct (C2H5)3B. Whereas 9 (in dilute solution) and 13 decarbonylate to detectable metal hydrides upon warming, the decomposition chemistry of the other formyls is more complex and sometimes involves the dichloromethane cosolvent. © 1982, American Chemical Society. All rights reserved.
author list (cited authors)
Tam, W., Lin, G., & Gladysz, J. A.