Esposti CD, Fuganti A, Kisiel Z, Tamassia F
Dipartimento di Chimica "G. Ciamician,&rdquo, Universitàdi Bologna, Via F. Selmi 2, Bologna, 40126, Italy
J Mol Spectrosc. 1998 Oct;191(2):316-325. doi: 10.1006/jmsp.1998.7643.
The millimeter-wave rotational spectra of 79BrNO and 81BrNO in the v2 = 1 and v3 = 2 vibrational states have been reinvestigated. Measurements of the rotational spectrum in the region of maximum c-type Coriolis interaction between the two states allowed the previous analysis to be extended to account for some uncommon effects. For the most perturbed transitions the nuclear quadrupole hyperfine structure arises from coupling of not only the bromine nucleus, but also the nitrogen nucleus with the rotational angular momentum. These effects were satisfactorily fitted with a Hamiltonian describing Coriolis coupling in a molecule with two quadrupolar nuclei. The successful analysis of pure rotational transitions then allowed accurate prediction of rovibrational transitions, six of which were measured for 79BrNO and four for 81BrNO. Copyright 1998 Academic Press.
重新研究了处于v2 = 1和v3 = 2振动态的79BrNO和81BrNO的毫米波转动光谱。在这两个态之间最大c型科里奥利相互作用区域对转动光谱进行测量，使得先前的分析得以扩展，以考虑一些不常见的效应。对于受扰最大的跃迁，核四极超精细结构不仅源于溴核与转动角动量的耦合，还源于氮核与转动角动量的耦合。这些效应通过一个描述具有两个四极核的分子中科里奥利耦合的哈密顿量得到了令人满意的拟合。对纯转动跃迁的成功分析进而使得对振转跃迁的精确预测成为可能，其中对79BrNO测量了六条，对81BrNO测量了四条。版权所有1998年学术出版社。
