110781-70-9Relevant academic research and scientific papers
One Step Closer to Structural Models for HDS Catalysts: Thienyl-Oxo Complexes of Re(V)
Stafford, Philip R.,Rauchfuss, Thomas B.,Wilson, Scott R.
, p. 5220 - 5225 (1995)
The present investigation focuses on thiophene derivatives of oxometal centers with low d-electron counts. Treatment of a THF slurry of ReOCl3(PPh3)2 with thienyllithium reagents afforded Li(THF)nReO(thienyl)4 wherethienyl is 2-C4H3S, 2-MeC4H2, 2-C8H5S (benzothienyl), and 2-C12H7S (dibenzothienyl). In contrast to the previously reported low-valent derivatives these species are reactive toward protic and oxidizing reagents. Electrochemical studies demonstrate that these Re(V) complexes undergo oxidation at mild potentials. Crystallographic analyses of Li(THF)3ReO(C4H3S)4 and Li(THF)4ReO(C8H5S)4 indicate a square pyramidal Re center with the four thienyl ligands tilted in a pinwheel arrangement. Studies on Re(2-C4H3S)(CO)5 reveal that it is stable toward hydrolysis.
Synthesis of Homoleptic Tetrahedral Aryls of Rhenium(IV) and Ruthenium(IV). X-Ray Crystal Structures of Tetrakis(o-mrthylphenyl)rhenium(IV), Tetrakis(o-methylphenyl)oxorhenium(VI), and Tetrakis(o-methylphenyl)-ruthenium(IV)
Savage, Paul D.,Wilkinson, Geoffrey,Motevalli, Majid,Hursthouse, Michael B.
, p. 669 - 674 (2007/10/02)
The reaction of ReCl4(thf)2 (thf = tetrahydrofuran) with o-methylphenylmagnesium bromide leads to the isolation of Re(o-MeC6H4)4, which has been characterized by X-ray crystallography.Air oxidation of this compound allows the isolation of the previously reported paramagnetic ReO(o-MeC6H4)4, which has also been characterized by X-ray crystallography.The interaction of aryl Grignard reagents with NEt4 (solv = acetonitrile or tetrahydrofuran) leads to the isolation of homoleptic, tetrahedral ruthenium(IV) species, Ru(aryl)4, aryl = o-methylphenyl, 2,6-dimethylphenyl, and p-t-butylphenyl.Tetrakis(mesityl)ruthenium(IV), mesityl = 2,4,6-trrimethylphenyl, and Ru(o-MeC6H4)4 can be obtained from the interaction of diruthenium (II,II) tetra-acetate, Ru2(μ-O2CMe)4, with the respective Grignard reagents.The X-ray crystal structure of Ru(o-MeC6H4(4 has also been determined.
Oxoaryls of Rhenium-(V) and -(VI) and Osmium(VI). X-Ray Crystal Structures of Dimesityldioxorhenium(VI), Tetramesityloxorhenium(VI), and Dimesityldioxoosmium(VI)
Stravropoulos, Pericles,Edwards, Peter G.,Behling, Torsten,Wilkinson, Geoffrey,Motevalli, Majid,Hursthouse, Michael B.
, p. 169 - 176 (2007/10/02)
The interaction of mesitylmagnesium bromide with or Re2O7 leads to the isolation of the diamagnetic rhenium(V) complex 2Mg(thf)2 (mes = mesityl, thf = tetrahydrofuran), which can be oxidized to the paramagnetic compound ReO2(mes)2; ReOCl4 gives, instead, the paramagnetic rhenium(V) complex ReO(mes)4 along with minor amounts of ReO2(mes)2, upon oxidation of the reaction solutions.All three rhenium starting materials with o-tolylmagnesium bromide or o-methoxyphenylmagnesium bromide lead similarly to the paramagnetic complexes ReO(o-MeC6H4)4 and ReO(o-MeOC6H4)4, respectively.The diamagnetic compound OsO2(mes)2 has also been prepared by oxidizing solutions from the interaction of osmium tetraoxide with the appropriate Grignard reagent.The X-ray crystal structures of ReO2(mes)2, OsO2(mes)2, and ReO(mes)4 have been determined to reveal tetrahedral, tetrahedral and tetragonal pyramidal geometries respectively.
