Byers, Peter K.Canty, Allan J.Honeyman, R. ThomasClaramunt, Rosa MaríaLópez, ConcepciónElguero, JoséLavandera Díaz, José Luis2013-10-292013-10-291992-10-29http://hdl.handle.net/10637/5526Artículo en colaboración con : Peter K. Byers, Allan J. Canty and R. Thomas Honeyman, Rosa M. Claramunt, Concepción López , José Luis Lavandera y José ElgueroEn: Gazzetta Chimica Italiana. ISSN 0016-5603. n. 122, 1992, págs 341-344The carbon-13 chemical shifts and tH-13C coupling constants of twelve polypodal ligands belonging to bis(pyrazol-1-yl)- and tris(pyrazol-1-yl)-methane classes are described. The chemical shifts show high internal consistency: for instance, a previously-reported additive model predicts, with great accuracy, the chemical shift of the central sp3 carbon. Coupling constants proved to be useful tools for the assignment of pyrazole carbons. The 11( 1 H-13C) coupling of the central carbon is linearly related to the basicity of the pyrazole substitutent in tris(pyrazol-1-yl)methanes.application/pdfenCompuestos heterocíclicos.Artículohttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es