High-resolution infrared spectroscopy of the asymmetric NO stretch band of jet-cooled nitromethane and assignment of the lowest four torsional states

被引：5

作者：

Dawadi, Mahesh B. ^{[1
]}

Degliumberto, Lou ^{[1
]}

Perry, David S. ^{[1
]}

Mettee, Howard D. ^{[2
]}

Sams, Robert L. ^{[3
]}

机构：

[1] Univ Akron, Dept Chem, Akron, OH 44325 USA

[2] Youngstown State Univ, Dept Chem, Youngstown, OH 44555 USA

[3] Pacific Northwest Natl Lab, Richland, WA 99352 USA

来源：

JOURNAL OF MOLECULAR SPECTROSCOPY | 2018年 / 343卷

关键词：

High-resolution infrared spectroscopy; Nitromethane; Internal rotation; IVR; INTRAMOLECULAR VIBRATIONAL REDISTRIBUTION; ROTATION ENERGY-LEVELS; SPECTRUM; MOLECULES; 1-BUTYNE; MATRIX;

D O I：

10.1016/j.jms.2017.08.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

A high-throughput CW slit-jet apparatus coupled to a high-resolution FTIR was used to record the asymmetric NO stretch band of nitromethane. The b-type band, including torsionally excited states with m <= 3, has been assigned for K-a" <= 10, J" <= 20. The ground state combination differences derived from these assigned levels were fit with the RAM36 program to give an RMS deviation of 0.0006 cm(-1). The band origin is 1583.0 (+/- 0.1) cm(-1) and the torsional level spacing is nearly identical to that in the ground state. The upper state levels are split into multiplets by perturbations. A subset of the available upper state combination differences for m = 0, K'(a) <= 7, J' <= 10 were fit with the same program, but with rather poorer precision (0.01 cm(-1)) than for the ground state. (c) 2017 Elsevier Inc. All rights reserved.

引用

页码：85 / 91

页数：7

共 29 条

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