Kinetic Isotope Effects in the Reactions of 4-Nitrophenylnitromethane with Alkylamidine Bases in Toluene
| dc.contributor.author | Caldin, Edward F. | |
| dc.contributor.author | Rogne, Otto | |
| dc.contributor.author | Wilson, Christopher J. | |
| dc.date.accessioned | 2025-04-28T04:49:39Z | |
| dc.date.available | 2025-04-28T04:49:39Z | |
| dc.date.issued | 1978 | |
| dc.description.abstract | Kinetic isotope effects have been determined for the proton-transfer and deuteron-transfer reactions of 4-nitrophenylnitromethane (4-NPNM; NO2C6H4CH2NO2, NO2C6H4CD2NO2) with two alkylamidine bases [HN = C(NEt2)R; R = n-butyl, n-nonyl] in toluene solution. The observed values of the isotopic rate ratio kHf/kDf at 25°C are 11.7 ± 1.0 and 8.0 ± 0.3, respectively. The former value indicates an appreciable tunnel correction; this is confirmed by a value of (ΔH[graphic omitted]D-ΔH[graphic omitted]H)= 2.5 ± 0.8 kcal mol–1(10 ± 3 kJ mol–1). The isotopic differences are not precise enough to allow calculations of the dimensions of the energy barrier. | en_US |
| dc.identifier.uri | http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/18806 | |
| dc.language.iso | en | en_US |
| dc.publisher | Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1978, 74 (07) | en_US |
| dc.subject | Chemistry | en_US |
| dc.subject | Kinetic Isotope Effect | en_US |
| dc.subject | Alkylamidine Bases | en_US |
| dc.subject | Journal of the Chemical Society : Faraday Transaction - I | en_US |
| dc.title | Kinetic Isotope Effects in the Reactions of 4-Nitrophenylnitromethane with Alkylamidine Bases in Toluene | en_US |
| dc.type | Article | en_US |