title: 3-(4-Fluoro-benz-yl)-1H-isochromene-1-thione.
abstract: In the mol-ecule of the title compound, C(16)H(11)FOS, the benzene ring is oriented at a dihedral angle of 89.68 (3)° with respect to the planar [maximum deviation 0.009 (2) Å] isocoumarin ring system. An intra-molecular C-H⋯S inter-action results in the formation of a planar five-membered ring. In the crystal structure, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into chains parallel to the c axis. A π-π contact between the isocoumarin rings [centroid-centroid distance = 3.818 (3) Å] may further stabilize the structure.
authors.forename: Tariq Mahmood
authors.initials: TM
authors.lastname: Babar
authors.forename: Ghulam
authors.initials: G
authors.lastname: Qadeer
authors.forename: Nasim Hasan
authors.initials: NH
authors.lastname: Rama
authors.forename: Muhammad
authors.initials: M
authors.lastname: Khawar Rauf
authors.forename: Wai-Yeung
authors.initials: WY
authors.lastname: Wong