The ultraviolet photodissociation of axial and equatorial conformers of 3-pyrroline |
| |
Authors: | Oliver Thomas A A King Graeme A Ashfold Michael N R |
| |
Institution: | School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom. |
| |
Abstract: | Resolved sets of photoproducts arising from the photodissociation of axial and equatorial conformers of 3-pyrroline have been observed using H(Rydberg) atom photofragment translational spectroscopy following excitation in the wavelength range of 250-213 nm. 3-pyrroline (alternatively 2,5-dihydropyrrole) is a five membered partially saturated heterocycle in which the bonding around the N atom is pyramidal (sp(3) hybridized) and the N-H bond can lie either axial or equatorial to the ring. Careful analysis of total kinetic energy release data derived from H atom time-of-flight measurements reveals excitation of the 3-pyrrolinyl cofragment consistent with N-H bond fission in both the axial and equatorial conformers. This allows determination of the energy difference between the ground state conformers to be 340±50 cm(-1) and the N-H bond strength for axial and equatorial conformers as 31,610±50 and 31,270±50 cm(-1), respectively. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|