Abstract
Reaction of [{Ru(η3:η3-C10H16)(µ-Cl)Cl}2]1(C10H16= 2,7-dimethyloctadienediyl) with one equivalent of pyrazine (pyz) or bis(diphenylphosphino)methane (dppm) leads to the formation of the neutral dimeric products [{Ru(η3:η3-C10H16)Cl2}2(µ-pyz)]2a and [{Ru(η3:η3-C10H16)Cl2}2(µ-dppm)]2b respectively. The neutral monomeric complexes [Ru(η3:η3-C10H16)Cl2(σ-pyz)]3a and [Ru(η3:η3-C10H16)Cl2(σ-dppm)]3b are obtained by reacting 1 with two equivalents of pyz and dppm respectively. The mixed valence diruthenium complex [{Ru(η3:η3-C10H16)Cl2}{Ru (η6-C6H6)Cl2}(µ-dppm)]5 is readily obtained from the reaction of 3b with [{Ru(η6-C6H6)(µ-Cl)Cl}2]4. The X-ray structures of complex 2b[space group P(no. 2), a= 11.914(1), b= 11.943(2), c= 19.524(2)A, α= 105.79(1), β= 107.64(1), γ= 91.01(1)°, Z= 2], and complex 5[space group P21(no. 4), a= 10.259(1), b= 21.284(2), c= 21.058(3)A, β= 94.48(1)°, Z= 4] are reported.
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