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Closed Access item Synthesis, structure and electronic properties of N-dialkylamino- and N-alkoxy-1,2,4-triazol-3-ylidene ligands

Authors:Alcarazo, Manuel
Fernández, Rosario
Álvarez, Eleuterio
Lassaletta, José M.
Keywords:Heterocycles, Carbenes, Rhodium
Issue Date:25-Oct-2005
Publisher:Elsevier
Citation:Journal of Organometallic Chemistry 690(24-25): 5979-5988 (2005)
Abstract:4-Amino- and 4-alkoxy-1,2,4-triazoles 4a–d and 6 were readily obtained from the reaction of N,N-dimethylformamidazin dihydrochloride 3 with hydrazines 2 and hydroxylamine 5. Alkylation of compounds 4a–d and 6 by MeOTf or MeI afforded azolium salts 9–11, which in turn were transformed into Rh(I) carbene complexes 13–15, Ag carbenes 16, and cationic Rh(I) bis-carbenes 17. Additionally, complexes 13 and 15 were transformed into dicarbonyl derivatives 18 and 19, and the carbonyl stretching frequencies of these compounds were used to evaluate the effect of the amino and alkoxy groups in the σ-donor ability of these 1,2,4-triazol-3-ylidenes.
Description:10 páginas, 4 figuras, 3 tablas, 6 esquemas.
Publisher version (URL):http://dx.doi.org/10.1016/j.jorganchem.2005.07.120
URI:http://hdl.handle.net/10261/37559
ISSN:10.1016/j.jorganchem.2005.07.120
0022-328X
Appears in Collections:(IIQ) Artículos

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