Oxidative addition reaction of o-quinones to triphenylantimony: novel triphenylantimony catecholate complexes |
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| Authors: | Vladimir K. Cherkasov Georgy K. Fukin Yury A. Kurskii Ludmila G. Abakumova Gleb A. Abakumov |
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| Affiliation: | G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Laboratory of the Chemistry of Organoelemental Compounds, 49 Tropinina Street, 603950 Nizhny Novgorod, Russia |
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| Abstract: | New catecholate Sb(V) complexes triphenyl(3,6-di-tert-butylcatecholato)antimony(V) Ph3Sb(3,6-DBCat) (1) and triphenyl(perchloroxanthrenecatecholato)antimony(V) Ph3Sb(OXCatCl) (2) were synthesized by the oxidative addition reaction of corresponding o-quinones (3,6-di-tert-butyl-o-benzoquinone and perchloroxanthrenequinone-2,3) with triphenylantimony. Catecholates 1 and 2 can alternatively be synthesized by reacting the appropriate thallium catecholate with triphenylantimony dichloride. The oxidative addition reaction of an equimolar ratio of 4,4′-di-(3-methyl-6-tert-butyl-o-benzoquinone) and triphenylantimony yielded 4-(2-methyl-5-tert-butyl-cyclohexadien-1,5-dion-3,4-yl)-(3-methyl-6-tert-butyl-catecholato)triphenylantimony(V) Ph3Sb(Cat-Q) (3); in the case of a 1:2 molar ratio, complex 4,4′-di-[(3-methyl-6-tert-butyl-catecholato)triphenylantimony(V)] Ph3Sb(Cat-Cat)SbPh3 (4) resulted. Complexes 1-4 were characterized by IR- and 1H NMR spectroscopy. Molecular structures of 1, 2 and 4 were determined by X-ray crystallography to be a distorted tetragonal-pyramidal. |
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| Keywords: | Antimony o-Quinones Catecholates Oxidative addition X-ray diffraction |
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