Deeply Reduced Polyoxomolybdates Capped by Early Transition Metals with Catalytic Hydrogenation of Nitrobenzene
1Clinical laboratory, The Second Hospital of Sanming City, Sanming 366000, Fujian China.
Abstract:
Deeply reduced polyoxometalates (POMs) capped by early transition metals, [V3IVMo6IVMo4VIO31py6]2- (1, py = pyridine) and [V2IVMo12IVMo8VIZn0.35H1.3+O54py12(HNMe2)2]2- (2), were prepared from solvothermal oxidative aggregations of [Mo3IVO2(O2CCH3)6(H2O)3]ZnCl4 and VO(acac)2 (acac = acetylacetonato). V3-capped Mo6IV-1 and V-capped Mo6IV-2 exhibit 12e-reduced POM structures characteristic of two [Mo3IVO4] incomplete cuboidal cluster units bridged by two(one) VO5 groups in 1(2), differing from those linked by SbO3/GeO4/SbO3-pyZnO4 groups in the previously reported [Sb2Mo6IVMo2VMo4VIO32(OH)2py6]2- (3), [Ge2Mo6IVMo2VMo4VIO34(OH)2py6]4- (4), and [Sb2ZnMo6IVMo2VMo4VIO32(OH)2py7] (5), respectively. Multiple MoIV···O//SbIII Lewis pairs in 1-3 construct well-organized Lewis catalysis fields (LCFs) featuring extensive Lewis acid-base synergistic interactions, which account for their excellent catalytic performance in heterogeneous hydrogen-transfer hydrogenation (HTH) reduction of nitrobenzene to aniline under mild conditions.
More Related Videos
09:21Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether
Published on: August 17, 2019
12:08Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
Published on: June 24, 2022
Related Concept Videos
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Preparation of Amines: Reduction of Oximes and Nitro Compounds
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
Reactions at the Benzylic Position: Oxidation and Reduction
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
