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Ultrafast electron diffraction: structures in dissociation dynamics of Fe(CO)_5

Ihee, H. and Cao, J. and Zewail, A. H. (1997) Ultrafast electron diffraction: structures in dissociation dynamics of Fe(CO)_5. Chemical Physics Letters, 281 (1-3). pp. 10-19. ISSN 0009-2614. doi:10.1016/S0009-2614(97)01167-6.

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We report on the application of ultrafast electron diffraction (UED) to the study of complex molecular reactions, the dissociation of Fe(CO)_5. Snapshots of the diffraction images were recorded at different reaction times. The reaction was initiated by a femtosecond pulse and clocked accurately within 2 ps. The dissociation is complete in less than 10 ps and we identify major product distributions and structures; Fe(CO)_2, Fe(CO) and Fe in the branching ratio of ca. 2:5:5. The C–O distance becomes longer, relative to that of Fe(CO)_5, suggesting a non-systematic weaker C–O bond in Fe(CO)_2 and Fe(CO) fragments. The temporal diffraction-difference method greatly enhances the ability of recording structural changes in UED.

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Additional Information:© 1997 Elsevier Science B.V. Received 15 September 1997; in final form 6 October 1997. This work was supported by a grant from the Air force Office of Scientific Research, the Office of Naval Research and the Laboratory for Molecular Sciences. We thank Chuck Williamson for his interest and initial efforts.
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Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Office of Naval Research (ONR)UNSPECIFIED
Issue or Number:1-3
Record Number:CaltechAUTHORS:20160824-074503286
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Official Citation:H Ihee, J Cao, A.H Zewail, Ultrafast electron diffraction: structures in dissociation dynamics of Fe(CO)5, Chemical Physics Letters, Volume 281, Issues 1–3, 19 December 1997, Pages 10-19, ISSN 0009-2614, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69874
Deposited By: Ruth Sustaita
Deposited On:26 Aug 2016 17:30
Last Modified:11 Nov 2021 04:21

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