Abstract
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The ESR spectra of the radicals BunCl3-SnOCMeCMeO. are interpreted to imply that when n = 0 or 1, the biacetyl acts as a cis-bidentate ligand. When n = 2 it is (probably cis) monodentate When n = 3 it can act as both a cis- and a trans-monodentate Ligand; the former is rapidly fluxional and the latter is more slowly fluxional on the ESR time scale. �� 1980.