Abstract
A T-shaped planar complex of ethyne and Cl 2 has been isolated in a mixture of the substances using a pulsed-nozzle, FT microwave spectrometer and characterised through its rotational spectrum. Rotational constants ( A 0, B 0, C 0), centrifugal distortion constants (Δ J , Δ JK , δ J ), and Cl-nuclear quadrupole coupling constants χ aa (Cl) and χ bb (Cl) χ cc (Cl) of both Cl nuclei are reported for the isotopomer (HCCH, 35Cl 2). The angular geometry, electric charge redistribution within the Cl 2 subunit and intermolecular force constant k σ, as derived from the spectroscopic constants, are compared with those of other B…Cl 2 and of the corresponding series B…HCl to give some generalisations.
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