Document Type
Article
Publication Date
2001
Abstract
The 17-electron complex (C5Ph5)Cr(CO)3 reacts with halogens (C6H5I•Cl2, Br2, and I2) in C6H6 to yield the dimeric oxidation products [(C5Ph5)Cr(m-X)X]2 as thermally stable solids. Reactions with other chlorinating agents similarly yield [(C5Ph5)CrCl2]2. An X-ray crystal structure of [(C5Ph5)Cr(m-Cl)Cl]2 was obtained. The magnetic properties of the Cl2 bridged dimer have been determined and modeled using the usual isotropic hamiltonian which yields J/k = –30 K. Low-temperature (77 K) Raman spectra of solid [(C5Ph5)CrX2]2 (X = Cl, I) allow assignments to be made for the metal-ring and metal halogen stretching modes in the low frequency region (< 600 cm-1). Tetrahydrofuran (THF) cleaves these dimers to yield complexes of the form (C5Ph5)CrX2(THF).
Recommended Citation
Hutton, M. A.; Durham, J. C.; Grady, R. W.; Harris, B. E.; Jarrell, C. S.; Mooney, J. M.; Castellani, M. P.; Rheingold, A. L.; Kölle, U.; Korte, B. J.; Sommer, R. D.; Yee, G. T.; Boggess, J. M.; Czernuszewicz, R. S., Halogen Oxidation Reactions of (C5Ph5)Cr(CO)3 and Lewis Base Addition To [(C5Ph5)Cr(-X)X]2: Electrochemical, Magnetic, and Raman Spectroscopic Characterization of [(C5Ph5)CrX2]2 and (C5Ph5)CrX2(THF) (X = Cl, Br, I). X-ray Crystal Structure of [(C5Ph5)Cr(-Cl)Cl]2. Organometallics 2001, 20 (4), 734-740.
Comments
This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Organometallics, copyright © American Chemical Society after peer review. To access the final edited and published work see http://dx.doi.org/10.1021/om000653o