An 15N NMR study of the protonation of two di-(alpha-pyridyl) compounds in solutions and the solid state.

Klimkiewicz, J; Stefaniak, L; Grech, E; Webb, G A; Wawer, I

Klimkiewicz, J; Stefaniak, L; Grech, E; Webb, G A; Wawer, I.

Afiliación

Klimkiewicz J; Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland.

Solid State Nucl Magn Reson ; 7(2): 79-81, 1996 Nov.

Article en En | MEDLINE | ID: mdl-8986019

RESUMEN

15N NMR data are reported for two Di-(alpha-pyridyl) derivatives in various stages of protonation. A combination of 15N NMR measurements taken, on a number of solutions, and on the solid state provide a quantitative overall view of the progress of protonation of these compounds. 15N shieldings, J(15N-1H) and 2J (15N-1H) interactions all provide information indicative of unsymmetrical monoprotonation in the solid state and producing both the monoprotonated [N-H-N]+ structure and the diprotonated structure in the presence of an excess of TFA.

Asunto(s)

Espectroscopía de Resonancia Magnética/métodos; Piridinas/química; Quinoxalinas/química; Isótopos de Nitrógeno; Protones; Soluciones

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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Piridinas / Quinoxalinas / Espectroscopía de Resonancia Magnética Idioma: En Revista: Solid State Nucl Magn Reson Asunto de la revista: DIAGNOSTICO POR IMAGEM / MEDICINA NUCLEAR Año: 1996 Tipo del documento: Article País de afiliación: Polonia Pais de publicación: Países Bajos

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