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metal-organic compounds
Two structures of the trinitromethane anion are reported. In tetra-n-butylammonium trinitromethanide, (C4H9)4N+.[C(NO2)3]-, the [C(NO2)3]- anion adopts the commonly observed C2v conformation, while in the Cs salt, caesium trinitromethanide, Cs+.[C(NO2)3]-, it adopts a distorted propeller conformation. Both stuctures exhibit cation-anion interactions that may influence the structure of the anion.
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