A NEW FORM OF COORDINATED CARBON - A C3 CHAIN THAT IS ANCHORED BY A TRANSITION-METAL ON EACH END AND SPANNED BY A 1/3
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A trirhenium carbene complex containing a C3OMe core, prepared from [Re]CCLi, [Re2(CO)10], and Me3OBF4, leads to complex 1 after abstraction of the methoxy group with BF3 and skeletal rearrangement. According to Xray crystal structure analysis, 1 exists predominantly as the resonance structure shown on the right. [Re] = (5C5Me5)Re(NO)(PPh3). (Figure Presented.) Copyright 1993 by VCH Verlagsgesellschaft mbH, Germany