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The center shifts and quadrupole splittings of solid Nan[Fen(CN)5L]-zH20 (where L = H20, NH3, N2H4, (CH3)2NH, C2HbNH2, C5H5N, -picoline, pyrazine, IV-methylpyrazinium ion, NO, N02™, CO, (CH3)2SO, and S032~) and solid M"[Fen(CN)6]ocH20 (where = H, Li, Na, K, Cs, and NH4) have been determined at room temperature. The center shifts of the ferrocyanides are affected by the cations in the lattice and are shown to be related to the ionicities of the solids. The Móssbauer parameters in frozen aqueous solution at 122 K of the sodium salts of [Fe(CN)BL]n" (where L = NH3, CBHBN, pyrazine, jV-methylpyrazinium ion, NO, CO, (CH3)2SO, and CN") have also been determined. A linear correlation is noted between the 13C NMR chemical shifts of the carbon atoms in the cyano ligands and the quadrupole splittings of [FetCN^L]"-, thereby demonstrating the influence of the ligand L on the electron density of the carbon atoms. A linear correlation is also noted between the enthalpies of activation from a kinetics study of dissociative reactions and the center shifts and quadrupole splittings. The Móssbauer parameters and the linear correlations are rationalized on the basis of theinteractions of the ligand L as well as matrix influences.

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