2024-03-28T15:39:15Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/833002016-02-17T16:37:20Zcom_10261_34com_10261_5com_10261_81col_10261_287col_10261_334
The structure and dynamic properties of 1H-pyrazole-4-carboxylic acids in the solid state
Infantes, L.
García, Garcia, M. A.
López, C.
Claramunt, Rosa M.
Elguero, José
The structure of three simple pyrazole-4-carboxylic acids unsubstituted in position 1 (NH derivatives) 1H-pyrazole-4-carboxylic acid (1), 3(5)-methyl-1H-pyrazole-4-carboxylic acid (2) and 3,5-dimethyl-1H-pyrazole-4- carboxylic acid (3) are discussed based on crystallographic results (two new structures) and solid-state NMR (CPMAS). Compounds 1 and 3 present polymorphism and one of the polymorphs of each compound shows solid-state proton transfer (SSPT). Compound 2 presents tautomerism that has been studied by NMR, both in the solid-state and in solution at low temperature. © by Oldenbourg Wissenschaftsverlag, München.
2013-10-04T10:10:32Z
2013-10-04T10:10:32Z
2013
2013-10-04T10:10:32Z
artículo
Zeitschrift für Physikalische Chemie 227: 841- 856 (2013)
http://hdl.handle.net/10261/83300
10.1524/zpch.2013.0377
eng
closedAccess
Oldenbourg Wissenschaftsverlag