(E)-3-(Oxolan-2-yl­idene)-1-phenyl­pyrrolidine-2,5-dione

In the title compound, C₁₄H₁₃NO₃, the dihedral angles between the central pyrrolidine ring and the pendant tetra­hydro­furan and phenyl rings are 5.34 (18) and 58.99 (17)°, respectively. The tetra­hydro­furan ring is almost planar (r.m.s. deviation = 0.008 Å). In the crystal, mol­ecules are linked by C—H...O inter­actions, generating a three-dimensional network.

(5-Fluoro-4′-methyl­biphenyl-3-yl)(2,4,6-tri­methyl­phen­yl)iodo­nium tri­fluoro­methane­sulfonate

In the title mol­ecular salt, C₂₂H₂₁FI⁺·CF₃SO₃⁻, the dihedral angle between the rings of the biphenyl group is 65.6 (1)°. The ring of the mesitylene group is inclined to the fluoro­benzene ring at an angle of 86.1 (3)° and the C—I—C bond angle is 97.0 (2)°. In the crystal, extremely short I...O contacts of 2.862 (5) and 2.932 (5) Å occur, due to the strong electrostatic inter­actions between the I atom and two adjacent tri­fluoro­methane­sulfonate counter-ions. There are also C—H...F and C—H...π inter­actions present: together with the I...O bonds, these result in a three-dimensional network.