Cyano-Bridged Bimetallic Complexes of Copper(II) with Nitroprusside. Crystal Structure of [Cu(H₂NCH₂CH(NH₂)CH₃)₂Fe(CN)₅NO] . H₂O

Zdenek Smékal, Zdenek Trávnícek, Jaromír Marek and Milan Nádvornik

Australian Journal of Chemistry 53(3) 225 - 228
Published: 2000

Abstract

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.

Keywords: Copper; infrared; iron; magnetic moment; synthesis; ultraviolet– visible; X-ray.

Full text doi:10.1071/CH99131

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