4,4-divinylazoarylene-bridged diruthenium complex bearing Ru(CO)Cl(PiPr3)2 as an inorganic catalyst
A 4,4′-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO)Cl(P i Pr 3 ) 2 moieties, its synthesis, and its use as an catalyst in organic processes.
1. A {Ru(CO)Cl(P i Pr 3 ) 2 }2(μ-{CH═CH—C 6 H 2 -( i Pr) 2 -2,6} 2 —N═N-4,4′) complex bearing two Ru(CO)Cl(P i Pr 3 ) 2 moieties having the formula I:
2. A method of making the 4,4′-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO)Cl(P i Pr 3 ) 2 moieties of claim 1 , the method comprising:
adding 2,2′,6,6′-tetraisopropyl-4,4′-diethynylazobenzene in CH 2 Cl 2 to a solution of HRu(CO)Cl(P i Pr 3 ) 2 in CH 2 Cl 2 to obtain a reaction mixture;
stirring the reaction mixture for at least about 1 hour to obtain a precipitate;
removing the CH 2 Cl 2 under reduced pressure;
washing the precipitate to remove unreacted starting material;
filtering and drying the precipitate; and
obtaining the 4,4′-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO)Cl(P i Pr 3 ) 2 moieties.
3. The method of making the 4,4′-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO)Cl(P i Pr 3 ) 2 moieties of claim 2 , wherein the precipitate is washed with n-hexane and MeOH.
4. The method of making the 4,4′-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO)Cl(P i Pr 3 ) 2 moieties of claim 2 , wherein the precipitate is dried in vacuo.
5. The method of making the 4,4′-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO)Cl(P i Pr 3 ) 2 moieties of claim 2 , wherein the HRu(CO)Cl(P i Pr 3 ) 2 and the 2,2′,6,6′-tetraisopropyl-4,4′-diethynylazobenzene are added in an about 0.42:0.25 molar ratio.
6. The method of making the 4,4′-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO)Cl(P i Pr 3 ) 2 moieties of claim 2 , wherein the 4,4′-divinylazoarylene-bridged diruthenium complex bearing two Ru(CO)Cl(P i Pr 3 ) 2 compound is obtained in an about 86% yield.