Reactions of dodecacarbonyltriruthenium with oxadienes

The results of the studies of thermal reactions of Ru₃(CO)₁₂ with oxadienes (4-methylchalcone and benzylideneacetone) have been surveyed. The reactions yield a number of hitherto unknown bi- and polynuclear complexes, whose structures were determined by X-ray diffraction analysis, NMR, and IR spectroscopy. The complexes obtained contain ³-coordinated structural moieties,viz., five-membered chelate oxaruthena rings and/or dihydropyranyl rings. The fundamental differences in the chemical behavior of Ru and Fe carbonyls in the reactions with oxadienes and the differences between the reactions of Ru carbonyls with oxa- and azadienes have been discussed.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 159–166, January, 1995.The authors are grateful to A. S. Batsanov who determined the structure of4a.This work was carried out with the financial support of the Russian Foundation for Basic Research (Projects No. 93-03-4028 and 94-03-08338).