Cobaltocene reductions of multiply bonded dirhenium complexes. II. The isolation of the paramagnetic species [(η5-C5H5)2Co][Re2(hp)4X2] (hp = anion of 2-hydroxypyridine; X = Cl, Br, or I)
1985; Elsevier BV; Volume: 105; Issue: 3 Linguagem: Inglês
10.1016/s0020-1693(00)85234-2
ISSN1873-3255
AutoresAnn R. Cutler, Richard A. Walton,
Tópico(s)Asymmetric Hydrogenation and Catalysis
ResumoReaction of the quadruply bonded dirhenium(III) complexes (n-Bu4N)2Re2X8 (X = Cl, Br, or I) with 2-hydroxypyridine (Hhp) in refluxing n-pentanol gives Re2(hp)4X2 in high yield (>;90%). These complexes are reduced by cobaltocene to yield the paramagnetic salts [(η5-C5H5)2Co][Re2(hp)4X2]. The spectroscopic (electronic absorption and infrared) and electrochemical properties of these sets of complexes are in accord with them possessing σ2π4δ2(Re26+) or σ2π4δ2δ*1(Re25+ ground state electronic configurations.
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