Hexacoordinate triphenylantimony(V) complex with tridentate bis-(3,5-di-tert-butyl-phenolate-2-yl)-amine ligand: Synthesis,NMR and X-ray study |
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Authors: | Andrey I Poddel’sky Nikolay V Somov Yury A Kurskii Vladimir K Cherkasov Gleb A Abakumov |
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Institution: | 1. G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Tropinina 49, 603950 Nizhniy Novgorod, GSP-445, Russia;2. Nizhniy Novgorod State University, Physical Faculty, Building 3, Gagarina Avenue 23, 603950 Nizhniy Novgorod, Russia |
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Abstract: | The oxidative addition reaction of 4,6-di-tert-butyl-N-(2-hydroxy-3,5-di-tert-butyl-phenyl)-o-iminobenzoquinone (IBQ) to triphenylantimony(III) proceeds with the migration of hydroxyl-proton to a nitrogen atom to form tridentate O,N,O′-coordinated bis-(3,5-di-tert-butyl-phenolate-2-yl)-amine ligand. In accordance with 1H, 13C, DEPT NMR data, the new hexacoordinate complex bis-(3,5-di-tert-butyl-phenolate-2-yl)-amine]triphenylantimony(V), (AP-AP)H]SbPh3 (1) in solution has a Cs symmetry plane leading to the equivalence of two O,N-chelate o-aminophenolato moieties. The molecular structure of 1 · acetone was studied by a single-crystal X-ray. Compound 1 was found to be air-stable both in solid and in solution. Its oxidation by PbO2 leads to paramagnetic 4,6-di-tert-butyl-N-(3,5-di-tert-butyl-phenolate-2-yl)-o-iminobenzosemiquinolato]triphenylantimony(V), (AP-ISQ)]SbPh3 (2). |
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