Mössbauer parameters (IS and NQS) for a series of hydrated sodium pentacyano-L ferrates(II) (L = monoprotonated diamines or nitrogenated heterocycles) are presented. Results are discussed in terms of electronic properties of the ligands. A tentative distinction between α-and π-bonding effects is shown and comparisons are made with previous results reported for related substances.Publicado on line en 2014.Facultad de Ciencias Exactas