SINTEZA ȘI CARACTERIZAREA STRUCTURALĂ A COMPLEXULUI HETEROMETALIC {Co2 La2 } IZOBUTIRAT ÎN BAZA N-BUTILDIETANOLAMINEI

Abstract

A new heterometalic [Co2 La2 (OH)2 (ib)4 (bdea)2 (NO3 )2 ]∙2MeCN (1) cluster has been syn thesized by the reaction of Co(II) isobutyrate (Hib = isobutyric acid) and La(NO3 )3 ∙ 6H2 O with N-butyldiethanolamine (H2 bdea) in acetonitrile. Single-crystal X-ray structural analysis reveals that 1 crystallizes with two acetonitrile molecules in the P21 /n space group of the monoclinic system with a = 14.769(5), b = 9.416(3), c = 19.538(6) Å, β=100.315(3)° and V = 2673.11(15) Å3 . Cluster 1 has a rhombic planar tetranuclear central core {Co(III)2 La(III)2 } best described as a „butterfly” motif with the La(III) ions ocupied the „body” positions and the Co(III) ions at the „wing” sites.