Five new complexes of compositions
[Cu(1,2-pn)2Fe(CN)5NO]·H2O
(1,2-pn = propane-1,2-diamine) and
[Cu(L)Fe(CN)5NO]·xH2O
(L = tmen
(N,N,N′,N′-tetramethylethane-1,2-diamine),
x = 0.5; L = trimeen
(N,N,N′-trimethylethane-1,2-diamine),
x = 1; L = dien
(N-(2-aminoethyl)ethane-1,2-diamine),
x = 0; L = medpt
(N-(3-aminopropyl)-N-methylpropane-1,3-diamine),
x = 2) have been isolated from the reaction
mixture of
Cu(ClO4)2·6H2O
(or CuCl2·2H2O), the amine
and Na2
[Fe(CN)5NO]·2H2O
in water. The complexes have been characterized by infrared and
ultraviolet–visible spectroscopies, and magnetic measurements.
Single-crystal X-ray structural analysis revealed that the
[Cu(1,2-pn)2Fe(CN)5NO]·H2O
complex assumes a cyanide-bridged binuclear structure in which iron(II) is
six-coordinated by five cyanide ligands and one nitrosyl group (the nitrosyl
group lies cis to the bridging cyanide group), while copper(II) is
five-coordinated by two propane-1,2-diamine ligands and a bridging cyanide
ligand in a distorted tetragonal pyramidal arrangement.