Synthesis and characterization of linear (CH)8-bridged bimetallic ruthenium complexes

Reactions of HCdropCCH(2)CH(OR)CH(OR)CH(2)CdropCH (R = H, MeSO2) with RuHCl(CO)(PPh3)(3) produced [RuCl(CO)(PPh3)(2)](2)(mu-CH=CHCH2CH(OR)CH(OR)CH2CH=CH), which on treatment with PMe3 gave [RuCl(CO)(PMe3)(3)](2)(mu-CH=CHCH2CH(OR)CH(OR)CH2CH=CH). Treatment of RuHCl(CO)(PPh3)(3) with (3E,5E)-HCdropCCH=CHCH=CHCdropCH produced [RuCl-(CO)(PPh3)(2)](2)(mu-CH=CHCH=CHCH=CHCH=CH). The later complex reacted with PMe3, 4-phenylpyridine (PhPy), and 2,6-(Ph2PCH2)(2)C5H3N (PMP) to give [RuCl(CO)(PMe3)(3)](2)(mu-CH=CHCH=CHCH=CHCH=CH), [RuCl(CO)(PhPY)(PPh3)(2)](2)(mu-CH=CHCH=CHCH=CHCH= CH), and [RuCl(CO)(PMP)](2)(mu-CH=CHCH=CHCH=CHCH=CH), respectively. The structures of [RuCl(CO)(PMe3)(3)](2)(mu-CH=CHCH2CH(OH)CH(OH)CH2CH=CH) and [RuCl(CO)(PMe3)(3)](2)-(mu-CH=CHCH=CHCH=CHCH=CH) have been confirmed by X-ray diffraction.