Abstract
By using either neat samples or very concentrated solutions in CDCl 3, the apical cluster carbon 13C NMR resonances in some neutral RCCo 3 (CO) 9 complexes have been observed in the region δ (C) 255–310 ppm. Apical cluster carbon atom resonances occur in the 13C spectra of concentrated sulfuric acid solutions of [(OC) 9 Co 3 CCRR′] + cations in the region δ (C) 255–286 ppm. Further discussion of the structure and bonding in these charged species is given.
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