Vinclozolin: 3-(3,5-di­chloro­phen­yl)-5-ethenyl-5-methyl-1,3-oxazolidine-2,4-dione

In the title compound, C₁₂H₉Cl₂NO₃, which is the fungicide vinclozolin, the dihedral angle between the oxazolidine ring mean plane [r.m.s. deviation = 0.029 Å] and the benzene ring is 77.55 (8)°. In the crystal, mol­ecules are linked via C—H...O hydrogen bonds, forming chains along [010]. The chains are linked by short Cl...Cl contacts [3.4439 (3) and 3.5798 (3) Å], resulting in a three-dimensional architecture.

Crystal structure of flufenoxuron: a benzoyl­urea pesticide

The title compound, C₂₁H₁₁ClF₆N₂O₃ (systematic name: 1-{4-[2-chloro-4-(trifluoromethyl)phenoxy]-2-fluorophenyl}-3-(2,6-di­fluoro­benzo­yl)urea), is a benzoyl­urea pesticide. The dihedral angles between the central fluoro­benzene ring and the terminal di­fluoro­phenyl ring and chloro­phenyl ring system are 62.15 (5) and 88.03 (5)°, respectively. In the crystal, N—H...O hydrogen bonds link adjacent mol­ecules, forming R₂²(8) inversion dimers that pack into loop chains along the a-axis direction by short F...F contacts [2.729 (2) Å]. In addition, the chains are linked by weak C—H...π and π–π inter­actions [inter-centroid distances = 3.661 (2) and 3.535 (12) Å], resulting in a three-dimensional architecture.

Crystal structure of 3,6-bis­(2-chloro­phen­yl)-1,2,4,5-tetra­zine: the acaricide clofentezine

The whole molecule of the title compound, C₁₄H₈Cl₂N₄, is generated by inversion symmetry. The dihedral angle between the 2-chloro­phenyl ring and the tetra­zine ring is 47.65 (5)°. In the crystal, mol­ecules are linked by slipped parallel π–π inter­actions [centroid–centroid distance = 3.8199 (5), normal distance = 3.3127 (8), slippage 1.902 Å] forming columns along the a-axis direction.

Crystal structure of difenoconazole

In the title compound difenoconazole [systematic name: 1-({2-[2-chloro-4-(4-chloro­phen­oxy)phen­yl]-4-methyl-1,3-dioxolan-2-yl}meth­yl)-1H-1,2,4-triazole], C₁₉H₁₇Cl₂N₃O₃, the dihedral angle between the planes of the 4-chloro­phenyl and 2-chloro­phenyl rings is 79.34 (9)°, while the dihedral angle between the planes of the triazole ring and the dioxolanyl group is 59.45 (19)°. In the crystal, pairs of C—H...N hydrogen bonds link adjacent mol­ecules, forming dimers with R₂²(6) loops. In addition, the dimers are linked by C—H...O hydrogen bonds, resulting in a three-dimensional architecture. Disorder was modeled for one C atom of the dioxolanyl group over two sets of sites with an occupancy ratio of 0.566 (17):0.434 (17).