A M�ssbauer study of some iron(II) complexes with methyl isocyanide, bipyridine and phenanthroline

Mossbauer parameters for hexacoordinate iron(II) complexes of the type [Fe(N-N)n(CNMe)m](ClO4)2 (m = 6, 4, 2 or 0; n = 0, 1, 2 or 3; N−N = 2,′ -bipyridine or 1,10-phenanthroline) have been determined. Treatment by a point-charge model including distortions has been carried out in order to rationalize the quadrupole splittings. A computer program has been developed to handle variable geometry systems.