The interaction of various Schiff bases, LH2, with trichloro-oxobits (triphenylphosphine) rhenium(V), tetrachlorobis(triphenylphosphine) ruthenium(IV), and other rhenium complexes has given rise to complexes of the following types: (a) ReV2O3L2 that have a linear ORe–O–ReO system which quadridentate ligands on each rhenium; (b) ReVOCIL that appear to be octahedral with trans ORe–Cl groups; (c) ReIVCl2L that are octahedral with trans chlorines; (d) complexes that have neutral Schiff bases, LH2 bound to the metal.
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Middleton et al. (1979) studied this question.