Abstract
The quadrupole moment of /sup 6/Li is smaller than that of any other isotope, so /sup 6/Li behaves in isotropic solutions like a spin-1/2 nucleus, and in environments where signals from /sup 7/Li are broad and difficult to observe, /sup 6/Li may give narrow lines. Whereas quadrupole relaxation is dominant for /sup 7/Li, dipolar interactions with the nearest protons dominate relaxation of /sup 6/Li. It should thus be possible by gated decoupling experiments with careful selective narrow-band irradiation of the /sup 1/H spectrum to use the nuclear Overhauser effect (NOE)/sup 4/ to identify those protons in an organolithium compound or lithium hydride that are close to a /sup 6/Li nucleus, and we have shown the validity of this approach by examining the structure in solution of some alkyltrihydrometalates (compounds of a type important as reducing agents in organic synthesis).
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