How to photograph a chemical reaction

Kenneth R Leopold, S. W. Reeve, M. A. Dvorak, W. A. Burns, R. S. Ford, F. J. Lovas, R. D. Suenram

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report the structural characterization of the gas phase adducts HCN and CH3CN with BF3. Both have symmetric top structures with the nitrogen end of the R-CN toward the boron, reminiscent of the well known dative bond chemistry of BF3 with nitrogen donors. The B-N bond lengths and N-B-F angles, however, are intermediate between those expected for van der Waals or covalent interactions. Moreover, in CH3CN-BF3, where comparison with x-ray crystallographic studies is possible, the gas phase adduct shows a markedly longer bond length and smaller N-B-F angle. We show that in a series of related BF3 and BH3 adducts, the bond length and bond angle can, in fact, be tuned almost continuously between the covalent and van der Waals limits. By analogy with classic crystallographic work by Buergi and Dunitz and coworkers, we discuss how members of such a series can be interpreted as snapshots along a generalized reaction path for the formation of the dative bond. Finally, in the context of such a path, we examine the evolution of other (non-structural) properties of the BF3 adducts as the donor-acceptor bond formation proceeds.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Int Soc for Optical Engineering
Pages170-178
Number of pages9
ISBN (Print)0819407844
StatePublished - Jan 1 1992
EventOptical Methods for Time- and State-Resolved Chemistry - Los Angeles, CA, USA
Duration: Jan 23 1992Jan 25 1992

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1638
ISSN (Print)0277-786X

Other

OtherOptical Methods for Time- and State-Resolved Chemistry
CityLos Angeles, CA, USA
Period1/23/921/25/92

Fingerprint

Bond length
photographs
adducts
Chemical reactions
chemical reactions
Nitrogen
vapor phases
Gases
nitrogen
Boron
X rays
boron
chemistry
x rays
interactions

Cite this

Leopold, K. R., Reeve, S. W., Dvorak, M. A., Burns, W. A., Ford, R. S., Lovas, F. J., & Suenram, R. D. (1992). How to photograph a chemical reaction. In Proceedings of SPIE - The International Society for Optical Engineering (pp. 170-178). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1638). Publ by Int Soc for Optical Engineering.

How to photograph a chemical reaction. / Leopold, Kenneth R; Reeve, S. W.; Dvorak, M. A.; Burns, W. A.; Ford, R. S.; Lovas, F. J.; Suenram, R. D.

Proceedings of SPIE - The International Society for Optical Engineering. Publ by Int Soc for Optical Engineering, 1992. p. 170-178 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1638).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Leopold, KR, Reeve, SW, Dvorak, MA, Burns, WA, Ford, RS, Lovas, FJ & Suenram, RD 1992, How to photograph a chemical reaction. in Proceedings of SPIE - The International Society for Optical Engineering. Proceedings of SPIE - The International Society for Optical Engineering, vol. 1638, Publ by Int Soc for Optical Engineering, pp. 170-178, Optical Methods for Time- and State-Resolved Chemistry, Los Angeles, CA, USA, 1/23/92.
Leopold KR, Reeve SW, Dvorak MA, Burns WA, Ford RS, Lovas FJ et al. How to photograph a chemical reaction. In Proceedings of SPIE - The International Society for Optical Engineering. Publ by Int Soc for Optical Engineering. 1992. p. 170-178. (Proceedings of SPIE - The International Society for Optical Engineering).
Leopold, Kenneth R ; Reeve, S. W. ; Dvorak, M. A. ; Burns, W. A. ; Ford, R. S. ; Lovas, F. J. ; Suenram, R. D. / How to photograph a chemical reaction. Proceedings of SPIE - The International Society for Optical Engineering. Publ by Int Soc for Optical Engineering, 1992. pp. 170-178 (Proceedings of SPIE - The International Society for Optical Engineering).
@inproceedings{379bb4428d41481f9d29cc7787df9377,
title = "How to photograph a chemical reaction",
abstract = "We report the structural characterization of the gas phase adducts HCN and CH3CN with BF3. Both have symmetric top structures with the nitrogen end of the R-CN toward the boron, reminiscent of the well known dative bond chemistry of BF3 with nitrogen donors. The B-N bond lengths and N-B-F angles, however, are intermediate between those expected for van der Waals or covalent interactions. Moreover, in CH3CN-BF3, where comparison with x-ray crystallographic studies is possible, the gas phase adduct shows a markedly longer bond length and smaller N-B-F angle. We show that in a series of related BF3 and BH3 adducts, the bond length and bond angle can, in fact, be tuned almost continuously between the covalent and van der Waals limits. By analogy with classic crystallographic work by Buergi and Dunitz and coworkers, we discuss how members of such a series can be interpreted as snapshots along a generalized reaction path for the formation of the dative bond. Finally, in the context of such a path, we examine the evolution of other (non-structural) properties of the BF3 adducts as the donor-acceptor bond formation proceeds.",
author = "Leopold, {Kenneth R} and Reeve, {S. W.} and Dvorak, {M. A.} and Burns, {W. A.} and Ford, {R. S.} and Lovas, {F. J.} and Suenram, {R. D.}",
year = "1992",
month = "1",
day = "1",
language = "English (US)",
isbn = "0819407844",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "Publ by Int Soc for Optical Engineering",
pages = "170--178",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

}

TY - GEN

T1 - How to photograph a chemical reaction

AU - Leopold, Kenneth R

AU - Reeve, S. W.

AU - Dvorak, M. A.

AU - Burns, W. A.

AU - Ford, R. S.

AU - Lovas, F. J.

AU - Suenram, R. D.

PY - 1992/1/1

Y1 - 1992/1/1

N2 - We report the structural characterization of the gas phase adducts HCN and CH3CN with BF3. Both have symmetric top structures with the nitrogen end of the R-CN toward the boron, reminiscent of the well known dative bond chemistry of BF3 with nitrogen donors. The B-N bond lengths and N-B-F angles, however, are intermediate between those expected for van der Waals or covalent interactions. Moreover, in CH3CN-BF3, where comparison with x-ray crystallographic studies is possible, the gas phase adduct shows a markedly longer bond length and smaller N-B-F angle. We show that in a series of related BF3 and BH3 adducts, the bond length and bond angle can, in fact, be tuned almost continuously between the covalent and van der Waals limits. By analogy with classic crystallographic work by Buergi and Dunitz and coworkers, we discuss how members of such a series can be interpreted as snapshots along a generalized reaction path for the formation of the dative bond. Finally, in the context of such a path, we examine the evolution of other (non-structural) properties of the BF3 adducts as the donor-acceptor bond formation proceeds.

AB - We report the structural characterization of the gas phase adducts HCN and CH3CN with BF3. Both have symmetric top structures with the nitrogen end of the R-CN toward the boron, reminiscent of the well known dative bond chemistry of BF3 with nitrogen donors. The B-N bond lengths and N-B-F angles, however, are intermediate between those expected for van der Waals or covalent interactions. Moreover, in CH3CN-BF3, where comparison with x-ray crystallographic studies is possible, the gas phase adduct shows a markedly longer bond length and smaller N-B-F angle. We show that in a series of related BF3 and BH3 adducts, the bond length and bond angle can, in fact, be tuned almost continuously between the covalent and van der Waals limits. By analogy with classic crystallographic work by Buergi and Dunitz and coworkers, we discuss how members of such a series can be interpreted as snapshots along a generalized reaction path for the formation of the dative bond. Finally, in the context of such a path, we examine the evolution of other (non-structural) properties of the BF3 adducts as the donor-acceptor bond formation proceeds.

UR - http://www.scopus.com/inward/record.url?scp=0026453998&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026453998&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0026453998

SN - 0819407844

T3 - Proceedings of SPIE - The International Society for Optical Engineering

SP - 170

EP - 178

BT - Proceedings of SPIE - The International Society for Optical Engineering

PB - Publ by Int Soc for Optical Engineering

ER -