Reduction of biscarborane: molecular structures of [(15-crown-5)3Na2](C2B10H11)2 and [P(C6H5)3CH3]2[.mu.-9,10-CH-(.mu.-9',10'-CH-nido-7'-CB10H11)-nido-7-CB10H11]

The synthesis, characterization, and elucidation of the structures of [(15-crown-5] 3 Na 2 ](C 2 B 10 H 11 ) 2 ([(15-crown-5) 3 NA 2 ](1)) and [P(C 6 H 5 ) 3 CH 3 ] 2 [μ-9,10-CH-(μ-9',10'-CH-nido-7'-CB 10 H 11 )-nido-7-CB 10 H 11 ]([P(C 6 H 5 ) 3 CH 3 ] 2 (2) are described