BIBLIOS

Tipo
Artigos em Revista

Tipo de Documento
Artigo Completo

Título
Molybdenum(II) Complexes with -Diimines: Catalytic Activity in Organic and Ionic Liquid Solvents

Participantes na publicação
Marta S. Saraiva (Author)
Dep. Química e Bioquímica
CQB
Carla D. Nunes (Author)
CQB
CQE
Vítor Félix (Author)
UNIVERSIDADE DE AVEIRO
Ana P. C. Ribeiro (Author)
INSTITUTO SUPERIOR TÉCNICO
Carlos Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Maria José Calhorda (Author)
Dep. Química e Bioquímica
CQB
BioISI

Resumo
\\\\nThe new [MoX(η3?C3H5)(CO)2(α?diimine)] complexes with: (i) X = Br or triflate and α?diimine = 1,10?phenanthroline (phen) and dipyridophenazine (dppz); and (ii) X = Br and α?diimine = phen and dppz, with several substituents, are synthesized and characterized. The structures of [MoBr(η3?C3H5)(CO)2(Cl?phen)] and [Mo(CF3SO3)(η3?C3H5)(CO)2(dppz)] are determined by using single?crystal X?ray diffraction. These and three complexes of 2,2′?bipyridyl (bpy), and its two derivatives with Me and tBu substituents, are tested in the homogeneous catalytic epoxidation of several olefins in dichloromethane, exhibiting, in general, a good selectivity towards the respective epoxide and relatively low TOFs. For the first time, the oxidation of cis?cyclooctene with some of these catalysts is also conducted in a variety of room?temperature ionic liquids (RTILs). In the presence of [MoBr(η3?C3H5)(CO)2(phen)], the conversions, in general, increase, compared with the reactions in organic solvents. Interestingly, different chemoselectivity is found when [C6mim][Ntf2] and [C2mim][FAP] are used with diol (24–26 %). On the other hand, [MoBr(η3?C3H5)(CO)2(L)] (L = Me?phen or dppz) exhibits much lower conversions in the RTILs tested than in common organic solvents.


Instituição
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Suporte
European Journal of Inorganic Chemistry

Identificadores da Publicação
ISSN - 1434-1948

Editora
Wiley



Identificadores do Documento
URL - http://dx.doi.org/10.1002/ejic.201800700
DOI - https://doi.org/10.1002/ejic.201800700

Identificadores de Qualidade
SCIMAGO Q2 (2018) - 0.736 - Inorganic Chemistry
Web Of Science Q2 (2018) - 2.578 - CHEMISTRY, INORGANIC & NUCLEAR - SCIE
SCOPUS Q2 (2017) - 0.828 - Inorganic Chemistry

Keywords
Catalysis Molybdenum ?-diimine epoxidation ionic liquids