부산대학교 도서관

The first Chatttype Mo0dinitrogen complex with a tetraphosphane ligand has been prepared and characterized by NMR as well as infrared and Raman spectroscopy. Importantly, the employed reaction route allows the stereospecific synthesis of this complex as trans[MoN22mesoprP4] prP4= a tetraphos ligand with a central propylene bridge. The stereoselectivity in the reaction course is induced by the oxidoiodidomolybdenumIV precursor [MoOIprP4]+which directs both phenyl groups of the bridging P atoms of prP4into a mesoconfiguration. The paper establishes a general strategy to synthesize mononuclear Mo0dinitrogen and related molybdenum complexes with multidentate phosphane ligands which has not been possible to date. Moreover, the obtained molybdenum tetraphos N2complex should exhibit a higher thermodynamic stability in the reactions of the Chatt cycle of synthetic nitrogen fixation than the conventional bisdiphos complexes, due to the linkage of the two diphosphane units by an alkyl bridge. © WileyVCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008