Crystal-structure determination and Hirshfeld surface analysis of two new thio­phene derivatives: (E)-N-{2-[2-(benzo[b]thio­phen-2-yl)ethen­yl]-5-fluoro­phen­yl}benzene­sulfonamide and (E)-N-{2-[2-(benzo[b]thio­phen-2-yl)ethen­yl]-5-fluoro­phen­yl}-N-(but-2-yn-1-yl)benzene­sulfonamide

In the title compounds, C(22)H(16)FNO(2)S(2) (I) and C(26)H(20)FNO(2)S(2) (II), the benzo­thio­phene rings are essentially planar with maximum deviations of 0.009 (1) and 0.001 (1) Å for the carbon and sulfur atom in compounds I and II, respectively. In I, the thio­phene ring system is almost orthogonal to the phenyl ring attached to the sulfonyl group, with a dihedral angle of 77.7 (1)°. In compound I, the mol­ecular structure is stabilized by weak C—H⋯O intra­molecular inter­actions formed by the sulfone oxygen atoms, which generate two S(5) ring motifs. In the crystal of I, N—H⋯O hydrogen bonds link the mol­ecules into R (2) (2)(8) rings, which are connected into a C(10) chain via C—H⋯F hydrogen bonds. Inter­molecular C—H⋯π inter­actions are also observed. In compound II, the mol­ecules are linked via C—H⋯O and C—H⋯F hydrogen bonding, generating infinite C(11) and C(13) chains running parallel to [010].