{"title":"苯中某些三氟乙酸吡啶酯红外光谱中的氘同位素效应","authors":"Z. Dega-Szafran, E. Dulewicz","doi":"10.1016/0378-4487(81)80061-1","DOIUrl":null,"url":null,"abstract":"<div><p>The infrared spectra of 10 substituted pyridines with trifluoroacetic acid-d<sub>1</sub> were examined in dry benzene and benzene-d<sub>6</sub> with respect to the mass effect on the AH stretching vibration. The isotopic frequency ratio of the gravity centres, V̄<sub>o</sub><sup>H</sup>/ V̄<sub>o</sub><sup>D</sup>, varies between 1.04 and 1.19. The isotopic frequency ratio, together with the previously described solvent effect on the chemical shift of hydrogen bonded protons, possibly indicates an expansion of the <figure><img></figure> distance on deuterium replacement.</p></div>","PeriodicalId":100049,"journal":{"name":"Advances in Molecular Relaxation and Interaction Processes","volume":"21 3","pages":"Pages 207-220"},"PeriodicalIF":0.0000,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4487(81)80061-1","citationCount":"4","resultStr":"{\"title\":\"Deuterium isotope effect in the IR spectra of some pyridine trifluoroacetates in benzene\",\"authors\":\"Z. Dega-Szafran, E. Dulewicz\",\"doi\":\"10.1016/0378-4487(81)80061-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The infrared spectra of 10 substituted pyridines with trifluoroacetic acid-d<sub>1</sub> were examined in dry benzene and benzene-d<sub>6</sub> with respect to the mass effect on the AH stretching vibration. The isotopic frequency ratio of the gravity centres, V̄<sub>o</sub><sup>H</sup>/ V̄<sub>o</sub><sup>D</sup>, varies between 1.04 and 1.19. The isotopic frequency ratio, together with the previously described solvent effect on the chemical shift of hydrogen bonded protons, possibly indicates an expansion of the <figure><img></figure> distance on deuterium replacement.</p></div>\",\"PeriodicalId\":100049,\"journal\":{\"name\":\"Advances in Molecular Relaxation and Interaction Processes\",\"volume\":\"21 3\",\"pages\":\"Pages 207-220\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1981-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0378-4487(81)80061-1\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advances in Molecular Relaxation and Interaction Processes\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0378448781800611\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Molecular Relaxation and Interaction Processes","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0378448781800611","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Deuterium isotope effect in the IR spectra of some pyridine trifluoroacetates in benzene
The infrared spectra of 10 substituted pyridines with trifluoroacetic acid-d1 were examined in dry benzene and benzene-d6 with respect to the mass effect on the AH stretching vibration. The isotopic frequency ratio of the gravity centres, V̄oH/ V̄oD, varies between 1.04 and 1.19. The isotopic frequency ratio, together with the previously described solvent effect on the chemical shift of hydrogen bonded protons, possibly indicates an expansion of the distance on deuterium replacement.
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