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A series of all-metal dinuclear alkaline-earth metallocenes, M 2 (η 5 -E 5 ) 2 (M=Be, Mg, Ca; E=Sb, Bi), have been calculated by the density functional theory (DFT). Natural Bonding Orbital (NBO) analysis indicates that the metal–metal bonds of the title compounds are all single bonds with each metal in its +1 oxidation state, and the bonding between the metal and the...
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