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Article: Resonance Raman study of the A-band short-time photodissociation dynamics of axial and equatorial conformers of iodocyclopentane

TitleResonance Raman study of the A-band short-time photodissociation dynamics of axial and equatorial conformers of iodocyclopentane
Authors
KeywordsPhysics chemistry
Physical chemistry
Issue Date1999
PublisherAmerican Institute of Physics. The Journal's web site is located at http://jcp.aip.org/jcp/staff.jsp
Citation
Journal Of Chemical Physics, 1999, v. 111 n. 24, p. 11034-11043 How to Cite?
AbstractWe have obtained resonance Raman spectra of iodocyclopentane in cyclohexane solution at three excitation wavelengths resonant with the A-band absorption. The A-band resonance Raman spectral bands can be assigned to fundamentals, overtones, and combination bands of seven axial conformer and eight equatorial conformer Franck-Condon active modes. The resonance Raman and absorption cross sections were simultaneously simulated using wave packet calculations and a simple model. The best fit parameters of the simulations and the normal mode descriptions were used to determine the A-band short-time photodissociation dynamics of the axial and equatorial conformers of iodocyclopentane. The axial and equatorial conformers exhibit noticeably different short-time photodissociation dynamics that suggest that the C-I bond cleavage process is conformation dependent. The axial conformer short-time photodissociation dynamics have larger changes in the carbon-carbon stretch and three carbon atom bending motions as well as the torsional motion about the α and β carbon atom bond. The CCI bending motions for the axial and equatorial conformers of iodocyclopentane as well as previously reported results for the equatorial conformer of iodocyclohexane are significantly smaller than CCI bending motions found for most noncyclic iodoalkanes examined so far. This suggests that the cyclic backbone restricts the initial motion of the C-I bond cleavage along the CCI bend in iodocycloalkanes compared to the noncyclic iodoalkanes. © 1999 American Institute of Physics.
Persistent Identifierhttp://hdl.handle.net/10722/42349
ISSN
2015 Impact Factor: 2.894
2015 SCImago Journal Rankings: 0.959
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZheng, Xen_HK
dc.contributor.authorLee, CWen_HK
dc.contributor.authorPhillips, DLen_HK
dc.date.accessioned2007-01-29T08:47:31Z-
dc.date.available2007-01-29T08:47:31Z-
dc.date.issued1999en_HK
dc.identifier.citationJournal Of Chemical Physics, 1999, v. 111 n. 24, p. 11034-11043en_HK
dc.identifier.issn0021-9606en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42349-
dc.description.abstractWe have obtained resonance Raman spectra of iodocyclopentane in cyclohexane solution at three excitation wavelengths resonant with the A-band absorption. The A-band resonance Raman spectral bands can be assigned to fundamentals, overtones, and combination bands of seven axial conformer and eight equatorial conformer Franck-Condon active modes. The resonance Raman and absorption cross sections were simultaneously simulated using wave packet calculations and a simple model. The best fit parameters of the simulations and the normal mode descriptions were used to determine the A-band short-time photodissociation dynamics of the axial and equatorial conformers of iodocyclopentane. The axial and equatorial conformers exhibit noticeably different short-time photodissociation dynamics that suggest that the C-I bond cleavage process is conformation dependent. The axial conformer short-time photodissociation dynamics have larger changes in the carbon-carbon stretch and three carbon atom bending motions as well as the torsional motion about the α and β carbon atom bond. The CCI bending motions for the axial and equatorial conformers of iodocyclopentane as well as previously reported results for the equatorial conformer of iodocyclohexane are significantly smaller than CCI bending motions found for most noncyclic iodoalkanes examined so far. This suggests that the cyclic backbone restricts the initial motion of the C-I bond cleavage along the CCI bend in iodocycloalkanes compared to the noncyclic iodoalkanes. © 1999 American Institute of Physics.en_HK
dc.format.extent132106 bytes-
dc.format.extent30208 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://jcp.aip.org/jcp/staff.jspen_HK
dc.relation.ispartofJournal of Chemical Physicsen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPhysics chemistryen_HK
dc.subjectPhysical chemistryen_HK
dc.titleResonance Raman study of the A-band short-time photodissociation dynamics of axial and equatorial conformers of iodocyclopentaneen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0021-9606&volume=111&issue=24&spage=11034&epage=11043&date=1999&atitle=Resonance+Raman+study+of+the+A-band+short-time+photodissociation+dynamics+of+axial+and+equatorial+conformers+of+iodocyclopentaneen_HK
dc.identifier.emailPhillips, DL:phillips@hku.hken_HK
dc.identifier.authorityPhillips, DL=rp00770en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1063/1.480488en_HK
dc.identifier.scopuseid_2-s2.0-0000121980en_HK
dc.identifier.hkuros50397-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0000121980&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume111en_HK
dc.identifier.issue24en_HK
dc.identifier.spage11034en_HK
dc.identifier.epage11043en_HK
dc.identifier.isiWOS:000084242200037-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZheng, X=7404090253en_HK
dc.identifier.scopusauthoridLee, CW=7410160954en_HK
dc.identifier.scopusauthoridPhillips, DL=7404519365en_HK

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