Thiazyl cyanide, NSCN, has been produced in a flow system by passing t
hiazyl chloride, NSCl, over heated silver cyanide, AgCN. The He I phot
oelectron spectrum of NSCN shows prominent bands at 11.33, 13.52, 14.0
2 and 14.97 eV, in good agreement with ab initio SCF molecular orbital
calculations. The first ionisation of NSCN is attributed to the remov
al of an electron from the weakly bonding 8a' HOMO,