ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Properties of Iron(II) and Iron(III) Perchlorate Complexes with Triphenylphosphine Oxide

V. Vančová, I. Ondrejkovičová, and M. Melník

Department of Inorganic Chemistry, Faculty of Chemical Technology, Slovak Technical University, CS-812 37 Bratislava

Abstract: α-Fe(OPPh₃)₄(ClO₄)₂ was prepared by the reaction of solution of iron(II) perchlorate hydrate and triphenylphosphine oxide in ethyl alcohol. β-Fe(OPPh₃)₄(ClO₄)₂ was prepared by the reaction of iron(III) perchlorate hydrate in acetonitrile solution with triphenylphosphine (PPh₃) and dioxygen. Fe(OPPh₃)₄(ClO₄)₃ was prepared by the reaction of ethanolic solution of iron(III) perchlorate hydrate with triphenylphosphine oxide.On the basis of spectral and magnetic properties of α- and β-Fe(OPPh₃)₄(ClO₄)₂ tetrahedral arrangement of ligands OPPH₃ around Fe(II) atom is suggested. The degree of distortion is different for the alpha and beta-forms and this allows to characterize these complexes as distortion isomers. For Fe(OPPh₃)₄(ClO₄)₃ we propose a square-planar arrangement of ligands around the Fe(III) atom. In all studied complexes the ClO₄ groups are attached by ionic bonding.

Full paper in Portable Document Format: 461a16.pdf

Chemical Papers 46 (1) 16–19 (1992)