A highly efficient dioxo(mu-oxo)molybdenum(VI) dimer catalyst for olefin epoxidation

abstract

The oxo-bridged dimer [Mo(2)O(4)(mu(2)-O)Cl(2)(pzH)(4)] (1;pzH = pyrazole) exhibits unusually high activity in the liquid-phase catalytic epoxidation of the cyclic olefins cyclooctene and (R)-(+)-limonene under mild conditions and in the absence of additional organic solvents, using tert-butyl hydroperoxide as the oxidant. The complex is stable under the reaction conditions and can be used in further catalytic runs without significant loss of performance. An X-ray crystallographic investigation reveals that 1 has an unprecedented and extremely rare all-cis configuration at each of the MoO(2)(mu(2)-O)Cl(pzH)(2) cores, which can be understood by considering supramolecular contacts and geometric factors.

keywords

DIOXO COMPLEXES; CRYSTAL-STRUCTURES; OXO MOLYBDENUM; LIGANDS; MONONUCLEAR; OXIDATION

subject category

Chemistry

authors

Pereira, CCL; Balula, SS; Paz, FAA; Valente, AA; Pillinger, M; Klinowski, J; Goncalves, IS

our authors

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".