title: Control over the E/Z selectivity of the catalytic dimerization of group 6 (Fischer) metal carbene complexes.
abstract: The systematic investigation of the effect of different catalysts and additives in the reaction of self-dimerization of alkoxychromium(0) (Fischer) carbene complexes resulted in the selection of Pd(P(t)Bu(3))(2) to effect this transformation with good to excellent E selectivities and acceptable to excellent chemical yields. This catalyst will allow the control of the geometry in the synthesis of polyconjugated olefins, one emerging application of these catalytic reactions.
authors.affiliation: Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain.
authors.forename: Gong M
authors.initials: GM
authors.lastname: Chu
authors.forename: Israel
authors.initials: I
authors.lastname: Fernández
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Sierra