NOVEL STRATEGIES FOR THE SYNTHESIS AND CRYSTALLIZATION OF ELECTROPHILIC DINUCLEAR CATIONS - SOLUTION AND SOLID-STATE PROPERTIES OF [RE2(NCCH3)10][MO6O19]2
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An attractive route to mixedvalent metal oxides has been developed from the observation that on slow heating 1 completely loses its acetonitrile ligands at temperatures below 350 C and is transformed into an oxide containing MoVI and Re in two oxidation states. Salt 1 is prepared surprisingly simply according to Equation (a) and shows unexpected electronacceptor properties, which makes it a potential source of a naked Re24+ ion. The structural parameters of the cation of 1 point to a ReRe triple bond, although no strong or donors stabilize the system. (Formula Presented.) Copyright 1992 by VCH Verlagsgesellschaft mbH, Germany