1. New Experimental Insight into the Nature of Metal−Metal Bonds in Digallium Compounds: J Coupling between Quadrupolar Nuclei.
- Author
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Kobera, Libor, Southern, Scott A., Rao, Gyandshwar Kumar, Richeson, Darrin S., and Bryce, David L.
- Subjects
MAGNETIC fields ,BORENIUM ions ,CARBON foams ,DATA analysis ,COMPUTER software metering - Abstract
Multiple bonding between atoms is of ongoing fundamental and applied interest. Here, we report a multinuclear (
1 H,13 C, and71 Ga) solid-state magnetic resonance spectroscopic study of digallium compounds which have been proposed, albeit somewhat controversially, to contain single, double, and triple Ga−Ga bonds. Of particular relevance to the nature of these bonds, we have carried out two-dimensional71 Ga J/ D-resolved NMR experiments which provide a direct measurement of J(71 Ga,71 Ga) spin-spin coupling constants across the gallium−gallium bonds. When placed in the context of clear-cut experimental data for analogous singly, doubly, and triply bonded carbon spin pairs or boron spin pairs, the71 Ga NMR data clearly support the notion of a different bonding paradigm in the gallium systems. Our findings are consistent with an increasing role across the purported gallane-gallene-gallyne series for classical and/or slipped π-type bonding orbitals. [ABSTRACT FROM AUTHOR]- Published
- 2016
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