Download or read book Resonance Raman Intensity Analysis Studies of Bond Selective Electronic Excitation in 1 2 dihaloethanes and Conformational Effects on the A band Short time Photodissociation Dynamics of 1 iodopropane Iodocyclohexane and Iodocyclopentane written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: (Uncorrected OCR) Abstract of thesis entitled RESONANCE RAMAN INTENSITY ANALYSIS STUDIES OF BOND SELECTIVE ELECTRONIC EXCITATION IN 1,2-DIHALOETHANES AND CONFORMATIONAL EFFECTS ON THE A-BAND SHORT-TIME PHOTODISSOCIATION DYNAMICS OF 1-IODOPROPANE, IODOCYCLOHEXANE AND IODOCYCLOPENTANE Submitted by Xuming ZHENG for the Degree of Doctor of Philosophy at The University of Hong Kong in February 2000 Resonance Raman spectra of 1-X-2-iodoethane (X = Cl, Br, I), 1-iodopropane, iodocyclopentane in cyclohexane solution, and iodocyclohexane in acetonitrile solution have been obtained with excitation wavelengths within their A-band absorption. Vibrational (FT-Raman and FT-Infrared) spectroscopic investigations, ab initio calculations, and normal coordinate analyses were carried out to make vibrational assignments for the anti- and the gauche-1-X-2-iodoethane (X= Cl, Br, I) conformers and the axial- and the equatorial-iodocyclopentane conformers. Normal coordinate calculations were done for all the compounds studied in order to obtain normal-mode vectors. The resonance Raman intensities and A-band absorption spectra were simulated using a simple model and time-dependent wavepacket calculations. The simulation results and normal mode vectors were used to find the short-time photodissociation dynamics in terms of internal coordinate displacements. The A-band short-time photodissociation dynamics (at 10 fs) of 1-X-2-iodoethanes show interesting trends as the X halogen atom becomes larger. As the molecule changes from iodoethane to 1-chloro-2-iodoethane and finally to 1,2-diiodoethane, the C-I bond length changes generally proceed from a fairly long and narrow range for iodoethane to broader ranges and shorter bond length changes for 1,2-diiodoethane. A similar trend for the C-C bond length changes is also observed with a narrower to a broader range of displacements as the molecule changes from iodoethane to 1,2-diiodoethane. This suggests that as the haloethyl group becomes more ma.
Download or read book Resonance Raman Intensity Analysis Studies of Bond Selective Electronic Excitation in 1 2 dihaloethanes and Conformational Effects on the A band Short time Photodissociation Dynamics of 1 iodopropane Iodocyclohexane and Iodocyclopentane written by Xuming Zheng and published by . This book was released on 2000 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bond Selective Electronic Excitation and Short Time Photodissociation Dynamics of Dihalomethanes from Resonance Raman Spectroscopy written by 郭偉明 and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Excited State Structure and Dynamics from Resonance Raman Intensity Analysis written by Christina Marie Stuart and published by . This book was released on 2007 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bond Selective Electronic Excitation and Short time Photodissociation Dynamics of Dihalomethanes from Resonance Raman Spectroscopy written by Wai-ming Kwok and published by . This book was released on 1997 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Excited State Structure and Dynamics from Absolute Resonance Raman Intensities written by Mary Katherine Lawless and published by . This book was released on 1993 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultraviolet Resonance Raman Investigations of Excited State Structure and Dynamics of L 3 dienes written by Mark Oluf Trulson and published by . This book was released on 1987 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Resonance Raman Spectroscopic Studies of Some Diazines written by Amanalah Aminzadeh and published by . This book was released on 1976 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports an investigation of the intensity behaviour in the preresonance Raman spectra of some normal modes of vibration of a series of diazine molecules (together with naphthalene). The main object of the study was to investigate the relation of Raman intensity in the preresonance region to the position and symmetry of the electronic states of the scattering molecule. The intensity behaviour of the Raman bands as a function of excitation wavenumber has been interpreted on the basis of the Albrecht-Hutley theory. The observations give information about the electronic states involved in the Raman scattering. The table shown gives a list of the bands investigated for the various molecules and summarises the wavenumbers and symmetries of the electronic states responsible for the Raman intensity of the corresponding Raman bands.....
