Chromium-53 nuclear magnetic resonance studies of pentacarbonylchromium-carbene complexes

Journal Article · Wed Dec 07 00:00:00 EST 1988 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00233a018· OSTI ID:5043473

Hafner, A; Hegedus, L S; DeWeck, G; Hawkins, B ^[1]; Doetz, K H ^[2]

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1. Colorado State Univ., Fort Collins (USA)
2. Universitaet Hans-Meerweinstrasse, Marburg (Germany, F.R.)

The {sup 53}Cr NMR spectra of 46 chromium-carbene complexes were recorded, and chemical shift and line width data are reported, along with associated infrared, uv-visible, and {sup 13}C NMR spectroscopic data. The {sup 53}Cr chemical shifts correlated very well with the donor-acceptor properties of the carbene ligand and were quite sensitive to steric influences on efficiency of {pi}-overlap of the heteroatom with the carbene carbon. There was no correlation of {delta}({sup 53}Cr) with reactivity toward imines to form {beta}-lactams, but line width appeared to be related to reactivity. Preliminary attempts to utilize {sup 53}Cr NMR data to direct synthetic utilization of chromium-carbene complexes are reported. 5 refs., 49 figs., 1 tab.

• OSTI ID: 5043473
• Journal Information: Journal of the American Chemical Society; (USA), Vol. 110:25; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBENES
MOLECULAR STRUCTURE
CARBONYLS
CHROMIUM COMPLEXES
CHROMIUM 53
EXPERIMENTAL DATA
INFRARED SPECTRA
NMR SPECTRA
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
CHROMIUM ISOTOPES
COMPLEXES
DATA
EVEN-ODD NUCLEI
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
NUCLEI
NUMERICAL DATA
RADICALS
SPECTRA
STABLE ISOTOPES
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties
400202 - Isotope Effects
Isotope Exchange
& Isotope Separation