Abstract

Abstract Mono‐ and dinuclear oxidorhenium(V) complexes with hemiacetal ligands were isolated from a reaction of (NBu4)[ReOCl4] with a potentially tetradentate Schiff base prepared from (1R,2R)‐cyclohexane‐1, 2‐diamine and (2‐formylphenyl)diphenylphosphine in methanol. The hemiacetal is formed by solvolysis of first one imine functionality of the Schiff base, whereas the second remains intact. The resulting amine/iminophosphine coordinates as a tridentate N,N, P ligand in a dinuclear compound. Ongoing degradation of the Schiff base gives more hemiacetal (HL1a) and the final product, the monomeric complex [ReOCl(L1a)2] is formed. Cleavage of the organic framework is not observed during the reaction of (NBu4)[ReOCl4] with a related Schiff base derived from ethylene‐1, 2‐diamine and (2‐formylphenyl)diphenylphosphine. The Schiff base reacts as a bis‐bidentate N, P ligand and a dinuclear oxorhenium(V) compound with a central ethylene bridge is formed.

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