Reaction of molybdenum(II) cluster alkoxides with phenol

Retention of the octahedral metal framework of Nb and Mo halide clusters in catalytic decomposition of phenyl acetate to phenol and ketene

“…Experimentally, Nb 6 Cl 11.2 species on average were formed by treatment at 250 • C, which correspond to the most catalytically active species. Since outer halogen ligands are generally labile and hence are replaced prior to the inner ligands [39], loss of the inner Cl ligands commenced at this stage, which is consistent with the results obtained by Raman and IR analyses. Above this temperature substantial loss of the Cl ligand and decrease of the catalytic activity started with increasing treatment temperature.…”

Catalytic ring-opening addition of thiols to epoxides in the gas-phase over molecular rhenium sulfide cluster complexes [Re6S8X6] (X=Cl, OH, H2O) with retention of their octahedral metal frameworks

“…Crystals of K 4 [Re 6 S 8 (OH) 6 ]·8H 2 O (2) were synthesized by heating 1 with KOH at 280 • C for 1 h followed by recrystallization from water [9]. Preparation of crystals of K 2 [Re 6 S 8 (OH) 4 [29] were synthesized using published procedures. The general procedure for the preparation of clusters supported on silica gel is described for 1.…”

Catalytic ring-attachment isomerization and dealkylation of diethylbenzenes over halide clusters of group 5 and group 6 transition metals

“…The crystals of the above complexes were crushed until they passed through a 150-mesh screen, but not a 200-mesh screen. Solid-state clusters of [Mo 6 Cl i 8 ]Cl a 2 Cl a-a 4/2 (2), were obtained by heating 1 at a rate of 100 • C/h to 200 • C, followed by a dwell at 200 • C for 6 h under vacuum [30]. Organic substrates employed were commercial products, and were used as received.…”