The title molecule, C18H17NS, contains an all-trans arrangement of the
central aliphatic system and exhibits an intramolecular S...beta H co
ntact of 2.71 Angstrom, which is favourable for hydrogen abstraction i
n a photochemical reaction. The angular parameters (describing the ori
entation of the H atom relative to the thiocarbonyl plane) are close t
o those expected for reaction via the (n,pi) excited state.