Intermediates in the gas-phase reactions of acetylene and halogens: the identification of the acetylene–BrCl complex by rotational spectroscopy

A T-shaped complex formed between acetylene and bromine monochloride is identified and characterised through its rotational spectrum, as detected in a mixture of the two components by using a fast-mixing nozzle incorporated into a pulsed-nozzle, F–T microwave spectrometer.