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.

In the title compound, C15H19N3O2, the piperazine ring adopts a chair conformation, with its N—C bonds in pseudo-equatorial orientations. The dihedral angle between the C atoms of the piperazine ring and the phthalamide ring system (r.m.s. deviaiton = 0.008 Å) is 89.30 (8)°. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds, generating a three-dimensional network and aromatic π–π inter­actions also occur [centroid–centroid distances = 3.556 (1)–3.716 (1) Å].

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.