Hetero-bimetallic yttrium(III)–rhenium(V)(salen) tetranuclear complex: Synthesis and crystal structure

Single crystals of a Y(III)–Re(V)(salen) tetranuclear complex have been obtained by the reaction between the [ReO(salen)(OMe)] and Y(hfac)3 · 2H2O compounds (where salen2− is the N,N′-ethan-1,2-diylbis(salicylidenamine) ligand and hfac− is the 1,1,1,5,5,5-hexafluoroacetylacetonate ligand). This crystallizes in the triclinic, space group P1¯ (No. 2). The lattice parameters are a = 12.222(5) Å, b = 12.783(5) Å, c = 15.222(4) Å, α = 86.276(5)°, β = 82.220(5)°, γ = 82.396(5)°, V = 2332.9(15) Å3 with Z = 2. The crystallographic structure of the {[Re(salen)]2O3 [Y(hfac)3(H2O)]2}(CHCl3)2(CH2Cl2)2 tetranuclear complex is composed of two terminal Y(hfac)3(H2O) moieties bridged by the linear central {[ReO(salen)]2O} entity.

Thanks to the unexpected hetero acidobasic reaction between the [ReO(salen)OMe] and Y(hfac)3 · 2H2O, a linear tetranuclear complex of formula {[Re(salen)]2O3[Y(hfac)3(H2O)]2}(CHCl3)2(CH2Cl2)2is designed and characterized by X-ray diffraction. It can be used as a model to build paramagnetic structures with the Ln(hfac)3 · 2H2O family.Figure optionsDownload as PowerPoint slide