HYPERCOORDINATE CARBON IN PROTONATED TETRAAURIOMETHANE MOLECULES
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abstract
The reaction of {[(Ph3P)AU]3O}+BF4- with Me3SiCHN2 gives dinitrogen and three crystalline products, two of which have been identified as {Ph3PCH-[Au(PPh3)]2}+BF4- (1) and {HC[Au(PPh3)]4}+BF4- (2). In crystals of 24CH2Cl2, the cation has a square pyramidal structure with an apical hydrogen atom at a central pentacoordinate carbon atom. The cations are associated to centrosymmetrical dimers with auriophilic contacts. 1995, American Chemical Society. All rights reserved.