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Synthesis and Structure of New Triphenylphosphine π-Complexes of Palladium(0) with p-Benzoquinone and Their Role in the Oxidative Carbonylation of Alkynes.-New Pd (0) complexes with PPh 3 , p-benzoquinone and hydroquinone are synthesized, which are catalytically active in the oxidative carbonylation of alkynes such as phenylacetylene (I). -(KULIK, ALEXANDER V.; BRUK, LEV G.; TEMKIN, OLEG N.; KHABIBULIN, VILDAR R.; BELSKY, VITALY K.; ZAVODNIK, VALERY E.; Mendeleev Commun. (2002) 2, 47-48; Lomonosov Moscow State Acad. Fine Chem. Technol., Moscow 117571, Russia; EN)