The Cl Nuclear Quadrupole Coupling Tensor of Dichlorosilane, SiH2Cl2

✍ Scribed by K.D. Hensel; W. Jager; M.C.L. Gerry; I. Merke

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 420 KB
• Volume: 158
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1993.1060

✦ Synopsis

The (b)-type rotational spectrum of ({ }^{28} \mathrm{SiH}{2}{ }^{35} \mathrm{Cl}{2}) has been remeasured in the frequency region 10.3-15.7 GHz ((J=1-10)) using a microwave Fourier transform (MWFT) cavity spectrometer. The MWFT technique has permitted resolution of the complex hyperfine patterns observed for this molecule, which in turn has allowed the precise determination of the (\mathrm{Cl}) nuclear quadrupole coupling constants. In particular, perturbations in the (9_{18}-8_{27}) transition have been analyzed to obtain a value for (\left|\chi_{a b}\right|). The quadrupole coupling tensor has been diagonalized to yield the principal values (\chi_{z z}=-38.33(13) \mathrm{MHz}, \chi_{x x}=17.60(13) \mathrm{MHz}), and (\chi_{y y}=20.7245(19) \mathrm{MHz}). The results are discussed in terms of the bonding in (\mathrm{SiH}{2} \mathrm{Cl}{2}). 1993 Academic Press, Inc.