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Smith-Freeman LA, Schroeder WP, Wittig C. AsH3 ultraviolet photochemistry. J Phys Chem A. 2009;113(10):2158-64doi: 10.1021/jp8094769.
Smith-Freeman, L. A., Schroeder, W. P., & Wittig, C. (2009). AsH3 ultraviolet photochemistry. The journal of physical chemistry. A, 113(10), 2158-64. https://doi.org/10.1021/jp8094769
Smith-Freeman, L A, et al. "AsH3 ultraviolet photochemistry." The journal of physical chemistry. A vol. 113,10 (2009): 2158-64. doi: https://doi.org/10.1021/jp8094769
Smith-Freeman LA, Schroeder WP, Wittig C. AsH3 ultraviolet photochemistry. J Phys Chem A. 2009 Mar 12;113(10):2158-64. doi: 10.1021/jp8094769. PMID: 19191739.
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J Phys Chem A. 2009 Mar 12;113(10):2158-64. doi: 10.1021/jp8094769.

AsH3 ultraviolet photochemistry.

The journal of physical chemistry. A

L A Smith-Freeman, W P Schroeder, C Wittig

Affiliations

  1. Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA.

PMID: 19191739 DOI: 10.1021/jp8094769

Abstract

High-n Rydberg time-of-flight spectroscopy has been used to study the 193.3 nm photolysis of AsH(3). The center-of-mass translational energy distribution for the 1-photon process, AsH(3) + h nu --> AsH(2) + H, P(E(c.m.)), indicates that AsH(2) internal excitation accounts for approximately 64% of the available energy [i.e., h nu - D(0)(H(2)As - H)]. Secondary AsH(2) photodissociation also takes place. Analyses of superimposed structure atop the broad P(E(c.m.)) distribution suggest that AsH(2) is formed with significant a-axis rotation as well as bending excitation. Comparison of the results obtained with AsH(3) versus those of the lighter group-V hydrides (NH(3), PH(3)) lends support to the proposed mechanisms. Of the group-V hydrides, AsH(3) lies intermediate between the nonrelativistic and relativistic regimes, requiring high-level electronic structure theory.

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