Homo- and hetero-metallic rhenium oxomethoxide complexes with a M4(µ-O)2(µ-OMe)4 planar core—a new family of metal alkoxides displaying a peculiar structural disorder. Preparation and X-ray single crystal study

Rhenium Nanochemistry for Catalyst Preparation

“…The bimetallic methoxides of rhenium-molybdenum and even tungsten-molybdenum could even be prepared via thermal co-condensation of rhenium (VII) oxide with molybdenum (VI) or tungsten (VI) methoxides in toluene [45]. The higher temperature of the reaction turned out, however, to promote dimerization with formation of insoluble compounds (see Scheme 7).…”

“…The anodic oxidation of rhenium metal in alcohols turned out to be a facile and practically quantitative pathway to the corresponding oxo alkoxides. The reaction in methanol provided a derivative of rhenium (VI) Re 2 O 3 (OMe) 6 as a primary product [45]. This compound, obtained earlier by halide metathesis reaction in [41], turned to be unstable in solution and prone to dimerization into Re 4 O 6 (OMe) 12 .…”

Dry reforming of methane on porous membrane catalytic systems

“…active components Pd-M (M = Co, Zn, Mn) and Re-W were also used. 7, 8 Prior to introducing catalytically active species, a buffer layer of TiO 2 was incorporated onto the internal walls of the mem brane channels. This allows an increase in the specific surface and a decrease in the pore size.…”

Rhenium alkoxides

“…In particular, the Re-(µ 2 O) bond lengths in Re 4 O 6 (OMe) 12 are 1.876(6)-1.905(5) and 2.046(6)-2.189(7) Å for the oxo and MeO ligands, respectively. 18 (9) Isomorphous replacement of atoms with similar properties affords crystalline complexes with variable com position in which the ratio of the two metals can be varied over a broad range. [45][46][47] In the complexes in question, this is mani fested in the fact that shortening of the M-O bond in duces elongation of the bond in the trans position.…”

“…Crystallization from the elec trolyte formed upon anodic dissolution of rhenium metal in MeOH affords the Re 4 O 6-y (OMe) 12+y crystals with variable composition (0 < y < 4), depending on the con ditions, in a yield of >70% based on Re 18. Crystallization from the elec trolyte formed upon anodic dissolution of rhenium metal in MeOH affords the Re 4 O 6-y (OMe) 12+y crystals with variable composition (0 < y < 4), depending on the con ditions, in a yield of >70% based on Re 18.…”