Issue 18, 2006

The ground-state rotational spectrum and molecular geometry of ethynylstannane

Abstract

The ground-state rotational spectra of 24 isotopomers of ethynylstannane have been observed by pulsed-jet, Fourier-transform microwave spectroscopy. The spectroscopic constants, B0,DJ and DJK are reported for symmetric-top isotopomers H3nSn12C12CH, where n = 116, 117, 118, 119, 120, 122 and 124, D3nSn12C12CH, where n = 116, 118, 120, 122 and 124, H3nSn13C12 CH and H3nSn12C13CH , where n = 116,118 and 120, and H3nSn12C12CD, where n = 116, 118 and 120. In addition, the values of A0, B0, C0, ΔJ and ΔJK were obtained for the three asymmetric-top isotopomers DH2nSn12C12CH, where n = 116, 118 and 120. Hyperfine structure was resolved and assigned in the transitions of the isotopomers H3nSnCCD, where n = 116, 118 and 120, and in the isotopomers H3117SnCCH and H3119SnCCH. In the former group, the hyperfine structure arises from D nuclear quadrupole coupling while in the latter group its origin lies in the spin-rotation coupling of the I = 1/2 Sn nuclear spin to the rotational motion. For these isotopomers, D nuclear quadrupole and spin-rotation coupling constants are determined where appropriate. The rotational constants obtained for the 24 isotopomers of H3SnCCH were used to obtain the following types of molecular geometry for ethynylstannane: r0, rs, and rm.

Graphical abstract: The ground-state rotational spectrum and molecular geometry of ethynylstannane

Article information

Article type
Paper
Submitted
09 Dec 2005
Accepted
28 Feb 2006
First published
24 Mar 2006

Phys. Chem. Chem. Phys., 2006,8, 2145-2152

The ground-state rotational spectrum and molecular geometry of ethynylstannane

J. Guillemin, S. Legoupy, S. Batten and A. Legon, Phys. Chem. Chem. Phys., 2006, 8, 2145 DOI: 10.1039/B517507K

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