A1 Refereed original research article in a scientific journal
Dioxomolybdenum(VI) complexes with tri- and tetradentate aminobis(phenolate)s
Authors: Lehtonen A, Sillanpaa R
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication year: 2005
Journal:: Polyhedron
Journal name in source: POLYHEDRON
Journal acronym: POLYHEDRON
Volume: 24
Issue: 1
First page : 257
Last page: 265
Number of pages: 9
ISSN: 0277-5387
DOI: https://doi.org/10.1016/j.poly.2004.11.003
Abstract
The reactions of tridentate ligands, bis(2-hydroxy-3,5-dimethylbenzyl)methylamine (H2ONOMe) and bis(2-hydroxy-3-tert-butyl-5-methylbenzyl)methylamine (H2ONO/Bu) with [MoO2(acac)(2)] (1) in methanol lead to the precipitation of monomeric dioxomolybdenum(VI) complexes [MoO2(ONOMe)(MeOH)] . MeOH (2a) and [MoO2(ONO/Bu)(MeOH)] . MeOH (2b), respectively. Identical reactions n acetonitrile provide dimeric complexes [Mo2O2(mu-O)(2)(ONOMe)(2)] (3a) and [Mo2O2(mu-O)(2)(ONO/Bu)(2)] (3b). The reactions of 1 with tetradentate ligands, N,N'-bis(2-hydroxy-3,5-dimethylbenzyl)-N,N'-dimethylethane-1,2-diamine (H2ONNOMe) and N,N'-bis(2-hydroxy-3,5-di-tert-butylbenzyl)-N,N'-dimethylethane-1,2-diamine (H2ONNOtBu) yield monomeric complexes [MoO2(ONNOMe)] (4a) and [MoO2(ONNOtBu)] (4b), respectively. All studied complexes catalyse oxotransfer reactions between DMSO and benzoin or triphenyl phosphine. Complexes can also be activated by Et2AlCl to polymerise norbornene. (C) 2004 Elsevier Ltd. All rights reserved.
The reactions of tridentate ligands, bis(2-hydroxy-3,5-dimethylbenzyl)methylamine (H2ONOMe) and bis(2-hydroxy-3-tert-butyl-5-methylbenzyl)methylamine (H2ONO/Bu) with [MoO2(acac)(2)] (1) in methanol lead to the precipitation of monomeric dioxomolybdenum(VI) complexes [MoO2(ONOMe)(MeOH)] . MeOH (2a) and [MoO2(ONO/Bu)(MeOH)] . MeOH (2b), respectively. Identical reactions n acetonitrile provide dimeric complexes [Mo2O2(mu-O)(2)(ONOMe)(2)] (3a) and [Mo2O2(mu-O)(2)(ONO/Bu)(2)] (3b). The reactions of 1 with tetradentate ligands, N,N'-bis(2-hydroxy-3,5-dimethylbenzyl)-N,N'-dimethylethane-1,2-diamine (H2ONNOMe) and N,N'-bis(2-hydroxy-3,5-di-tert-butylbenzyl)-N,N'-dimethylethane-1,2-diamine (H2ONNOtBu) yield monomeric complexes [MoO2(ONNOMe)] (4a) and [MoO2(ONNOtBu)] (4b), respectively. All studied complexes catalyse oxotransfer reactions between DMSO and benzoin or triphenyl phosphine. Complexes can also be activated by Et2AlCl to polymerise norbornene. (C) 2004 Elsevier Ltd. All rights reserved.
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