The title benzamide derivative, C14H12ClNO2, crystallizes with two independent mol­ecules in the asymmetric unit. Both are close to being planar, with dihedral angles between the two benzene rings of 11.92 (6) and 12.80 (7)°. In the crystal structure, N—H⋯O hydrogen bonds link mol­ecules into chains along a. These inter­actions are augmented by C—H⋯O hydrogen bonds to form two-dimensional layers in the ac plane. Additional C—H⋯O inter­actions result in a three-dimensional network consisting of undulating rows along c. The crystal studied was an inversion twin with a 0.59 (3):0.41 (3) domain ratio.

In the title benzamide derivative, C11H14ClNO, the chlorobenzene and butylamine groups are each planar, with mean deviations from the planes of 0.013 and 0.030 Å, respectively, and a dihedral angle of 2.54 (9)° between the two planes. In the crystal structure, N—H...O hydrogen bonds link molecules in rows along a. Short intermolecular Cl...Cl interactions [3.4225 (5) Å] link these rows into sheets in the ac plane. Additional weak C—H...O and C—H...π interactions generate a three-dimensional network

The structure of the title compound was originally reported from film data (Brice et al., Inorg Chem 9:362, 1970) and comprises a triangle of cobalt atoms capped by an ethylidyne substituent to form an approximately tetrahedral cluster unit. The triphenylphosphine ligand lies in an equatorial position with respect to the plane of the cobalt triangle. Two carbonyl groups, one axial the other equatorial, complete the coordination sphere of the cobalt atom bound to phosphorus. The other two cobalt atoms each carry two equatorial and one axial carbonyl ligand. The Co-Co bond cis to the phosphine substituent is significantly longer than the other two Co-Co distances. The crystal structure is stabilised by C-HÁÁÁp interactions and C-HÁÁÁO hydrogen bonds.

In the title compound, C14H12FNO, the ortho-F atom and corresponding H atom on the fluoro­benzene ring are disordered over two positions with occupancies of 0.856 (4) and 0.144 (4). The amide unit is planar with a maximum deviation of 0.0057 (16) Å and the amide plane makes dihedral angles of 38.27 (11)° with the fluoro­benzene ring plane and 37.53 (10)° with the tolyl ring. The two benzene rings are inclined at an angle of 4.17 (15)°. In the crystal structure, chains form along b through N—H⋯O hydrogen bonds augmented by C—H⋯π inter­actions. Additional inter­molecular C—H⋯O and C—H⋯F hydrogen bonds further stabilize the structure, forming layers in the ac plane.

In the title compound, C17H17FO3, the benzene ring of the isochroman unit is inclined at 84.96 (7)° to the fluoro­benzene ring plane, and the pyran ring adopts a half-boat conformation. In the crystal structure, C—H⋯O hydrogen bonds link mol­ecules into rows along the c axis, while C—H⋯O inter­actions and C—H⋯F hydrogen bonds to the fluorine acceptor stack the mol­ecules down the b axis. In addition, the crystal structure exhibits a weak C—H⋯π inter­action between a methyl H atom of the meth­oxy group and the dimethoxy­benzene ring of an adjacent mol­ecule.