Abstract: The unstable chlorine and bromine thiocyanate molecules have been generated in the gas phase by reaction of AgSCN (solid) or (SCN) z (gas) with molecular chlorine or bromine, respectively. ISCN does not appear to be formed by this route. The structures are established as nonlinear XSC= N molecules, and the observed He1 photoelectron spectra are assigned on this basis with the assistance of minimal basis ab initio calculations. The ...