abstract
The dinuclear complex [Mo2O6(di-tBu-bipy)(2)] (1) (di-tBu-bipy = 4,4'-di-tert-butyl-2,2'-bipyridine) was obtained as a minor product of the hydrothermal reaction of MoO3 and di-tBu-bipy, and structurally characterized by single-crystal X-ray diffraction. In the molecular structure of 1 two distorted MoO6 octahedra share a common edge to form a dioxo-bridged Mo2O6 unit which is coordinated by di-tBu-bipy ligands. The catalytic performance of 1 for the epoxidation of non-functionalized olefins using tert-butylhydroperoxide as oxidant compares favorably with that reported for other oxomolybdenum(VI) complexes bearing the same organic ligand. The catalyst exhibits regioselectivity toward internal olefin epoxidation over external olefin epoxidation. (C) 2012 Elsevier B.V. All rights reserved.
keywords
CAMBRIDGE STRUCTURAL DATABASE; TERT-BUTYL HYDROPEROXIDE; BOND-VALENCE PARAMETERS; DIOXOMOLYBDENUM(VI) COMPLEXES; CRYSTAL-STRUCTURE; LEWIS-BASE; MOLYBDENUM; LIGANDS; LIQUID; OXO
subject category
Chemistry
authors
Amarante, TR; Neves, P; Paz, FAA; Pillinger, M; Valente, AA; Goncalves, IS
our authors
Anabela Tavares Aguiar Valente
Principal Researcher
Filipe Alexandre Almeida Paz
Principal Researcher
Isabel Maria de Sousa Gonçalves
Associate Professor
Martyn Pillinger
Principal Researcher
Patrícia dos Santos Neves
Assistant Researcher
Tatiana Ribau Amarante
Junior Researcheracknowledgements
We are grateful to the Fundacao para a Ciencia e a Tecnologia (FCT), the Programa Operacional Ciencia e Inovacao (POCI) 2010, Orcamento do Estado (OE), Fundo Europeu de Desenvolvimento Regional (FEDER) and CICECO (Pest-C/CTM/LA0011/2011) for financial support. The FCT is acknowledged for financial support toward the purchase of the single-crystal diffractometer. We thank the FCT for a PhD grant to TRA (SFRH/BD/64224/2009) and a post-doctoral grant to PN (SFRH/BPD/73540/2010).