The neutral mononuclear complex [ReOBr2(ami)] ( 1 ) [Hami?=?2-(1-ethanolaminomethyl)-1-methylimidazole] was prepared by reaction of ( n -Bu4N)[ReOBr4(OPPh3)] with an equimolar amount of Hami in acetonitrile. Further reaction of 1 with disodium oxalate (Na2ox) in methanol yielded the mixed didentate–terdentate complex [ReO(ox)(ami)] ( 2 ). These compounds were characterized by spectroscopy and X-ray crystallography. Both complexes have distorted octahedral geometry with the alcoholate oxygen of ami – coordinated trans to the oxo group. In 1 the Br–Re–Br angle equals 89.91(3)° and in 2 the oxalate has a bite angle of 81.0(2)°.
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Document Type: Research Article
Department of Chemistry, Nelson Mandela Metropolitan University, 6000 Port Elizabeth, South Africa
Department of Chemistry, Ludwig-Maximilians University, D-81377 München, Germany
Publication date: July 20, 2005