Imaging nucleophilic substitution dynamics

J. Mikosch; S. Trippel; C. Eichhorn; R. Otto; U. Lourderaj; J. X. Zhang; W. L. Hase; M. Weidemüller; R. Wester

doi:10.1126/science.1150238

Imaging nucleophilic substitution dynamics

J. Mikosch, S. Trippel, C. Eichhorn, R. Otto, U. Lourderaj, J. X. Zhang, W. L. Hase, M. Weidemüller, R. Wester

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

302 Scopus citations

Abstract

Anion-molecule nucleophilic substitution (S_N2) reactions are known for their rich reaction dynamics, caused by a complex potential energy surface with a submerged barrier and by weak coupling of the relevant rotational-vibrational quantum states. The dynamics of the S_N2 reaction of Cl^-+ CH₃I were uncovered in detail by using crossed molecular beam imaging. As a function of the collision energy, the transition from a complex-mediated reaction mechanism to direct backward scattering of the I^- product was observed experimentally. Chemical dynamics calculations were performed that explain the observed energy transfer and reveal an indirect roundabout reaction mechanism involving CH₃ rotation.

Original language	English
Pages (from-to)	183-186
Number of pages	4
Journal	Science
Volume	319
Issue number	5860
DOIs	https://doi.org/10.1126/science.1150238
State	Published - Jan 11 2008

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abstract = "Anion-molecule nucleophilic substitution (SN2) reactions are known for their rich reaction dynamics, caused by a complex potential energy surface with a submerged barrier and by weak coupling of the relevant rotational-vibrational quantum states. The dynamics of the SN2 reaction of Cl-+ CH3I were uncovered in detail by using crossed molecular beam imaging. As a function of the collision energy, the transition from a complex-mediated reaction mechanism to direct backward scattering of the I- product was observed experimentally. Chemical dynamics calculations were performed that explain the observed energy transfer and reveal an indirect roundabout reaction mechanism involving CH3 rotation.",

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AU - Mikosch, J.

AU - Trippel, S.

AU - Eichhorn, C.

AU - Otto, R.

AU - Lourderaj, U.

AU - Zhang, J. X.

AU - Hase, W. L.

AU - Weidemüller, M.

AU - Wester, R.

PY - 2008/1/11

Y1 - 2008/1/11

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AB - Anion-molecule nucleophilic substitution (SN2) reactions are known for their rich reaction dynamics, caused by a complex potential energy surface with a submerged barrier and by weak coupling of the relevant rotational-vibrational quantum states. The dynamics of the SN2 reaction of Cl-+ CH3I were uncovered in detail by using crossed molecular beam imaging. As a function of the collision energy, the transition from a complex-mediated reaction mechanism to direct backward scattering of the I- product was observed experimentally. Chemical dynamics calculations were performed that explain the observed energy transfer and reveal an indirect roundabout reaction mechanism involving CH3 rotation.

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SN - 0036-8075

VL - 319

SP - 183

EP - 186

JO - Science

JF - Science

IS - 5860

ER -

Imaging nucleophilic substitution dynamics

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