Methylation sites in tris(μ-thiolato)dimolybdenum(III) complexes

Abstract : Attempts at methylating cis-[Mo2Cp2(μ-SMe)3L2](BF4) [Cp = η5-C5H5; L = CO (1a) CNxyl (1b), CNBut (1c), NCMe (1d)] with methyl triflate gave the corresponding thioether-bridged cations [Mo2Cp2(μ-SMe)2(μ-SMe2)L2]2+ (42+), except in the case of 1a which did not react at room temperature. The electronic properties of the ancillary ligands L thus have a crucial influence on the course of this reaction. The dimeric compounds [Mo2Cp2(μ-SMe)3(CNBut)(CN)] (2) and [Mo2Cp2(μ-SMe)3{μ-η1-Ndouble bond; length as m-dashC(CH3)CH2CN}] (3), which potentially offer the alternatives of S- or N-methylation, reacted with methylating agents to give mainly the S-methylated derivatives 5 and 7. Only in the case of the nucleophilic reactant 2 was N-methylation also observed and isomer 6 was obtained as a minor product together with 5. New complexes have been completely characterised by multinuclear NMR, IR and elemental analysis, supplemented for 5 by X-ray diffraction study at 100 K.
Type de document :
Article dans une revue
Journal of Organometallic Chemistry, Elsevier, 2006, 691 (4), pp.566 - 572. 〈10.1016/j.jorganchem.2005.09.042〉
Liste complète des métadonnées

http://hal.univ-brest.fr/hal-01582159
Contributeur : Nicolas Renard <>
Soumis le : mardi 5 septembre 2017 - 16:23:52
Dernière modification le : jeudi 11 janvier 2018 - 06:17:07

Identifiants

Collections

Citation

Nolwenn Cabon, François Y. Pétillon, Philippe Schollhammer, Jean Talarmin, Kenneth W. Muir. Methylation sites in tris(μ-thiolato)dimolybdenum(III) complexes. Journal of Organometallic Chemistry, Elsevier, 2006, 691 (4), pp.566 - 572. 〈10.1016/j.jorganchem.2005.09.042〉. 〈hal-01582159〉

Partager

Métriques

Consultations de la notice

30