Intramolecular B-H bond activation from a dihydridobis(dimethylpyrazolyl)borate ligand: Formation of a rhodium(III) carbene hydride and a rare example of reverse alpha-hydride migration

Authors
Yeston, JS Bergman, RG
Citation
Js. Yeston et Rg. Bergman, Intramolecular B-H bond activation from a dihydridobis(dimethylpyrazolyl)borate ligand: Formation of a rhodium(III) carbene hydride and a rare example of reverse alpha-hydride migration, ORGANOMETAL, 19(16), 2000, pp. 2947-2949
Citations number
32
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANOMETALLICS
ISSN journal
02767333 → ACNP
Volume
19
Issue
16
Year of publication
2000
Pages
2947 - 2949
Database
ISI
SICI code
0276-7333(20000807)19:16<2947:IBBAFA>2.0.ZU;2-6
Abstract
The new complex Bp(2)(Me)Rh(CO)(pyridine) (1) has been prepared and reacts with CH3I to yield the novel Rh carbene hydride complex HB(Me(2)pz)(2)Rh(H) -(I)(C5H5N)(C(O)ME) (3), resulting from formal addition of CH3I across the Rh-C bond concomitant with hydride transfer from B to Rh. Thermolysis of 3 induces migration of the Rh hydride to the ct-carbon to give HB(Me(2)pz)(2) Rh(I)(C5H5N)(CH(O)Me) (6), and a crossover study, supports intramolecular m echanisms for both hydride transfer steps.