Isotope effect in proton-transfer and association-dissociation reactions for butylamine by ultrasonic relaxation methods
文献类型：期刊论文
| 作者 | Huang N ; Nishikawa S ; Dong SJ |
| 刊名 | bulletin of the chemical society of japan
 |
| 出版日期 | 1999 |
| 卷号 | 72期号:8页码:1741-1747 |
| 关键词 | AQUEOUS-SOLUTIONS ABSORPTION METHOD KINETICS SURFACTANTS WATER 2-PROPANOL ENTHALPY H2O |
| ISSN号 | 0009-2673 |
| 通讯作者 | nishikawa s |
| 中文摘要 | ultrasonic absorption coefficients were measured for butylamine in heavy water (d2o) in the frequency range from 0.8 to 220 mhz and at concentrations from 0.0278 to 2.5170 mol dm(-3) at 25 degrees c; two kinds of relaxation processes were observed. one was found in relatively dilute solutions (up to 0.5 mol dm(-3)), which was attributed to the hydrolysis of butylamine. in order to compare the results, absorption measurements were also carried out in light water (h2o). the rate and thermodynamic parameters were determined from the concentration dependence of the relaxation frequency and the maximum absorption per wavelength. the isotope effects on the diffusion-controlled reaction were estimated and the stability of the intermediate of the hydrolysis was considered while comparing it with the results for propylamine in h2o and d2o. another relaxation process was observed at concentrations greater than 1 mol dm(-3) in d2o. in order to examine the solution characteristics, proton nmr measurements for butylamine were also carried out in d2o. the chemical shifts for the gamma- and delta-proton in butylamine molecule indicate the existence of an aggregate. from profiles of the concentration dependence of the relaxation frequency and the maximum absorption per wavelength of sound absorption, the source of the relaxation was attributed to an association-dissociation reaction, perhaps, associated with a hydrophobic interaction. the aggregation number, the forward and reverse rate constants and the standard volume change of the reaction were determined. it was concluded from a comparison with the results in h2o that the hydrophobic interaction of butylamine in d2o is stronger than that in h2o. also, the isotope effect on this reaction was interpreted in terms of the solvent structure. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000082370300009 |
| 公开日期 | 2010-11-04 |
| 源URL | [http://202.98.16.49/handle/322003/21667]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Huang N,Nishikawa S,Dong SJ. Isotope effect in proton-transfer and association-dissociation reactions for butylamine by ultrasonic relaxation methods[J]. bulletin of the chemical society of japan,1999,72(8):1741-1747. |
| APA | Huang N,Nishikawa S,&Dong SJ.(1999).Isotope effect in proton-transfer and association-dissociation reactions for butylamine by ultrasonic relaxation methods.bulletin of the chemical society of japan,72(8),1741-1747. |
| MLA | Huang N,et al."Isotope effect in proton-transfer and association-dissociation reactions for butylamine by ultrasonic relaxation methods".bulletin of the chemical society of japan 72.8(1999):1741-1747. |
入库方式： OAI收割
来源：长春应用化学研究所
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