Abstract
Tricarbonyl(fulvene)chromium complexes, (C 5H 4CR 2)Cr(CO) 3, react with HgCl 2 and SnCl 4, respectively, to give stable 1 : 1 adducts. The metal basicity of the tricarbonyl(fulvene)chromium complexes is largely determined by the electronic properties of the substituents R at the exocyclic carbon atom of the fulvene ligand. The first crystalline protonation product of a fulvene complex was obtained by treatment of [η 5-6,6-bis(dimethylamino)fulvene]Cr(CO) 3 with HBF 4.
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