Abstract
The reactions of [NBu4][ReOCl4] with potentially tetradentate bis(salicylidene)amine ligands (sal2en = H2L) have been investigated. The bimetallic rhenium(V) complex [NBu4]2[Re2O2Cl6(L)] (2a) is formed if the ligand precursor H2L contains two CH2 units bridging the imino groups of the sal2en fragments, while monomeric octahedral rhenium(V) compounds [ReOCl(L)] (2b−d) are formed if three carbon atoms form the bridge. In contrast to similar technetium compounds where a symmetrical equatorial arrangement is observed, the rhenium complex exhibits an asymmetric nonplanar coordination of the ligand. The crystal structures of mono- and bimetallic derivatives have been determined. Crystal data are as follows: 2a, monoclinic, space group P21/c, a = 23.003(3) A, b = 13.385(1) A, c = 24.344(4) A, β = 93.88(7)°, R = 0.045 for 7974 reflections; 2b, monoclinic, space group P21/n, a = 12.094(2) A, b = 15.410(2) A, c = 14.857(3) A, β = 108.49(2)°, R = 0.034 for 3415 reflections; 2c, monoclinic, space group P21/n, a = 10...
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