abstract
The molybdenum(II) tricarbonyl complexes [Mo(CO)(3)I2L (n) ] (n = 1, L = 2,2'-bipyridine, 4,4'-di-tert-butyl-2,2'-bipyridine; n = 2, L = pyridine, 4-tert-butylpyridine) have been examined as catalyst precursors for the epoxidation of the biorenewable olefin methyl oleate with tert-butylhydroperoxide. In situ oxidative decarbonylation of the precursors gives highly active and selective molybdenum(VI) catalysts, which were identified as the one-dimensional molybdenum oxide/bipyridine polymer [MoO3(2,2'-bipyridine)], octanuclear [Mo8O24(4,4'-di-tert-butyl-2,2'-bipyridine)(4)], and the pyridinium beta-octamolybdates (LH)(4)[Mo8O26] for L = pyridine or 4-tert-butylpyridine.
keywords
EPOXIDIZED SOYBEAN OIL; TERT-BUTYL HYDROPEROXIDE; UNSATURATED FATTY-ACIDS; OLEFIN EPOXIDATION; TUNGSTEN COMPLEXES; VEGETABLE-OILS; ETA(5)-CYCLOPENTADIENYL MOLYBDENUM; CYCLOALKYL MOIETIES; BETA-OCTAMOLYBDATE; CRYSTAL-STRUCTURE
subject category
Chemistry
authors
Gamelas, CA; Neves, P; Gomes, AC; Valente, AA; Romao, CC; Goncalves, IS; Pillinger, M
our authors
Ana Catarina Costa Gomes Alves
Assistant Researcher
Anabela Tavares Aguiar Valente
Principal Researcher
Isabel Maria de Sousa Gonçalves
Associate Professor
Martyn Pillinger
Principal Researcher
Patrícia dos Santos Neves
Assistant Researcheracknowledgements
We are grateful to the Fundacao para a Ciencia e a Tecnologia (FCT), QREN, FEDER, COMPETE, the European Union and the Associate Laboratory CICECO (Pest-C/CTM/LA0011/2011) for continued support and funding. The FCT is acknowledged for a post-doctoral grant to PN (SFRH/BPD/73540/2010). The NMR spectrometers are part of The National NMR Network (REDE/1517/RMN/2005), supported by POCI 2010 and the FCT.