Nuclear Magnetic Resonance Spectra of Organometallic Compounds

5-3 NUCLEAR MAGNETIC RESONANCE SPECTRA OF ORGANOMETALLIC COMPOUNDS 

As in organic chemistry, chemical shifts, splitting patterns, and coupling constants are useful in characterizing the environments of individual atoms in 

13C NMR has become increasingly useful with the advent of modern instrumentation. Although the isotope 13C has a low natural abundance (approximately 1.1 %) and low sensitivity for the NMR experiment (about 1.6% the sensitivity of H), Fourier transform techniques now make it possible to obtain useful 13C spectra for a wide range of organometallic complexes. Nevertheless, the time necessary to obtain a 13C spectrum may still be an experimental difficulty for compounds present in very small amounts or those having low solubility. Rapid reactions may also be inaccessible by this technique. Some useful features of 13C spectra include the following  

Approximate ranges of chemical shifts for 13C spectra of some categories of organometallic complexes are listed in Table 5-3.25 Several features of these data deserve comment. The wide ranges of chemical shifts should be noted, a reflection 

25For extensive tables of chemical shifts for organic ligands, see Footnote 23a. 

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Nuclear Magnetic Resonance Spectra of Organometallic Compounds, 3, 1 Of Time and Carbon-Metal Bonds, 9, 1... 

Nuclear Magnetic Resonance Spectra of Organometallic Compounds, 3,1... 

Hayes, S., "Nuclear magnetic resonance spectra of organometallic compounds, Bull. Soc. Chim. France 196 2715-18 CA 62 6033. 

Spectroscopic Properties of Inorganic and Organometallic Compounds, ed. N. N. Greenwood, vols. 1 (1968), 2 (1969), 3 (1970). Each volume surveys the literature of the year before publication, under seven main chapter headings Nuclear magnetic resonance spectroscopy Nuclear quadrupole resonance spectra Electron spin resonance spectroscopy Microwave spectroscopy Vibrational spectra Electronic spectra and Mossbauer spectroscopy. 

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