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Alkali metal compounds of a gallium(I) carbene analogue {:Ga[N(Ar)C(Me)]2} (Ar = 2,6-Pr2C6H3) |
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| Authors: | Yanyan Liu Xiao-Juan Yang Qian-Shu Li Henry F Schaefer |
| Institution: | a State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China b Center for Computational Quantum Chemistry, School of Chemistry and Environment, South China Normal University, Guangzhou 510631, China c Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602, USA d State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China |
| Abstract: | A gallium dichloro complex (L −)GaIIICl2 (1) with an α-diimine ligand (2,6-iPr2C6H3)NC(Me)]2 (L0 represents the neutral ligand, L− is the radical-anionic form of the ligand, and L represents its dianion L2−) was used to synthesize a series of alkali metal complexes of an N-heterocyclic carbenes (NHCs)-like gallium(I) species. Reduction of the precursor 1 with three equivalents of Na, Li, K or KC8, respectively, in THF gave the complexes LGaINa(THF)3] (2), LGaILi(THF)3] (3), LGaI{μ2-K(THF)4}GaIL]K(THF)6] (4) and LGaI(μ2-K){μ2-K(THF)2}GaIL] (5). In these complexes, the original radical-anionic ligand was further reduced to the dianion, whereas the GaIII ion was reduced to GaI to yield the NHCs analogue :GaN2C2]−, which then coordinated to alkali metal ions to form the complexes 2-5. Single crystal X-ray diffraction analyses revealed that these complexes feature direct Ga-M bonds (M = Li, Na, and K), which have also been studied by DFT computations. |
| Keywords: | Gallium(I) NHCs analogue Alkali metals Ga-M bond |
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