A1 Refereed original research article in a scientific journal
Alkoxo, chlorido, and methyl derivatives of oxidomolybdenum(VI) complexes with tetradentate [O3N]-type ligands
Authors: Lehtonen A, Sillanpaa R
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication year: 2007
Journal:: Polyhedron
Journal name in source: POLYHEDRON
Journal acronym: POLYHEDRON
Volume: 26
Issue: 18
First page : 5293
Last page: 5300
Number of pages: 8
ISSN: 0277-5387
DOI: https://doi.org/10.1016/j.poly.2007.07.036
Abstract
Dioxomolybdenum(VI) complex [MoO2(Heg)(2)] (H(2)eg = 1,2-ethanediol) reacts with phenolic ligand precursors tris(2-hydroxy-3,5dimethylbenzyl)amine (H3LMe) and tris(2-hydroxy-3,5-di-tert-butylbenzyl)amine (H3LtBu) to form oxomolybdenum(VI) complexes of type [MoO(L-R) (Heg)]. The Heg ligand can be replaced by other alcohols (i.e. 2-aminoethanol, 2-amino-2-methylpropan-1-ol, 2-(dimethylamino)ethanol or allyl alcohol) in the reaction at refluxing toluene or at neat alcohol. Treatment of [MoO(L-R)(Heg)] with Me3SiCl yields corresponding chlorido complexes [MoO(L-R)Cl]. These are also formed in the reaction of H3LR with [MoO2Cl2(dmf)(2)]. The reaction of [MoO(L-R)Cl] with MeMgI yields air-stable monomethyl derivatives [MoO(L-R)(Me)]. X-ray analyses of [MoO(L-tBu)X] (X = Heg, 2-methyl-2-aminopropanolate anion or Cl) reveal that the ligand L-R has a tetradentate coordination through three oxygen donors and one nitrogen donor, which is located trans to the terminal oxo group. The sixth coordination site is occupied by an oxygen donor, a chlorido ligand or a methyl group. (c) 2007 Elsevier Ltd. All rights reserved.
Dioxomolybdenum(VI) complex [MoO2(Heg)(2)] (H(2)eg = 1,2-ethanediol) reacts with phenolic ligand precursors tris(2-hydroxy-3,5dimethylbenzyl)amine (H3LMe) and tris(2-hydroxy-3,5-di-tert-butylbenzyl)amine (H3LtBu) to form oxomolybdenum(VI) complexes of type [MoO(L-R) (Heg)]. The Heg ligand can be replaced by other alcohols (i.e. 2-aminoethanol, 2-amino-2-methylpropan-1-ol, 2-(dimethylamino)ethanol or allyl alcohol) in the reaction at refluxing toluene or at neat alcohol. Treatment of [MoO(L-R)(Heg)] with Me3SiCl yields corresponding chlorido complexes [MoO(L-R)Cl]. These are also formed in the reaction of H3LR with [MoO2Cl2(dmf)(2)]. The reaction of [MoO(L-R)Cl] with MeMgI yields air-stable monomethyl derivatives [MoO(L-R)(Me)]. X-ray analyses of [MoO(L-tBu)X] (X = Heg, 2-methyl-2-aminopropanolate anion or Cl) reveal that the ligand L-R has a tetradentate coordination through three oxygen donors and one nitrogen donor, which is located trans to the terminal oxo group. The sixth coordination site is occupied by an oxygen donor, a chlorido ligand or a methyl group. (c) 2007 Elsevier Ltd. All rights reserved.
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