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Spectres de vibration et liaison hydrogène du cyclobutane 1-1 dicarboxylate acide de potassium

✍ Scribed by G. Cassanas; E. Fabregue; L. Bardet


Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
402 KB
Volume
43
Category
Article
ISSN
1386-1425

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✦ Synopsis


crystal structure of potassium hydrogen cyclobutane l-l dicarboxylate has been determined by X-ray analysis. This acid salt has a short unsymmetrical intermolecular hydrogen bond with 0 0 = 2,53 A, but the carboxylic residues show only small differences in dimensions. Polycrystalline samples of CB(C00)2HK-l,l and its O-deuterated analog have been studied by i.r. and Raman spectroscopy. An assignment of the bands is given, the details of the hydrogen bond bands are discussed; in particular the isotopic effect (vOH/ vOD _ l), the combination bands in the region 19Mt2500 cm-' and the carbonyl region. It suggested that the acid salt belongs to Speakman's pseudo A type.


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