Magnetic and electrochemical studies on the series [CrnFe3–n(µ3-O)(gly)6(H2O)3][NO3]7·xH2O (gly = glycine; n= 0,1,2, or 3) and on the mixed-valence complex [FeIIFeIII2(µ3-O)(gly)6(H2O)3]Cl6

Abstract

A series of oxo-centred trinuclear glycinate-bonded complexes [Cr_nFe_3-n(µ₃-O)(gly)₆( H₂O)₃][NO₃]₇·-xH₂O (gly = glycine; n= 0, 1, 2, or 3) has been synthesised. [Fe^IIFe^III₂(µ₃-O)(gly)₆(H₂O)₃] Cl₆ has also been prepared and this is the first example of a mixed-valence triangulo O,O-glycinate bonded complex. Detailed magnetic data for all five complexes down to liquid-nitrogen temperature are discussed and electrochemical data for the complexes are also reported.