Meth­yl 4,6-dichloro­chroman-2-carboxyl­ate

In the title compound, C₁₁H₁₀Cl₂O₃, the six-membered heterocyclic ring adopts a half-chair conformation. An inter­molecular C—H...O hydrogen bond and π–π stacking are observed in the crystal structure.

2-(2,4-Di­hydroxy­phenyl)-N,N-di­methyl-2-oxoacet­amide

In the crystal structure of the title compound, C₁₀H₁₁NO₄, O—H...O inter- and intramolecular hydrogen bonds are present, as well as intermolecular C—H...O interactions.

Isoprop­yl 2-(5,7-dimeth­yl-1,2,4-triazolo[1,5-a]pyrimidin-2-yl­oxy)benzoate

In the title compound, C₁₇H₁₈N₄O₃, which displays good herbicidal activity, the planar bicyclic triazolopyrimidine system is bound to the benzoic acid isoprop­yl ester moiety via an O bridge. The dihedral angle formed by the bicylic triazolopyrimidine system and the benzene ring is 106.2 (2)°. Neither intra- nor inter­molecular hydrogen bonds are found.

2-(5-Benz­yl­oxy-2,4-dichloro­phen­yl)per­hydro­isoindole-1,3-dione monohydrate

The crystal structure of the title compound, C₂₁H₁₉Cl₂NO₃·H₂O, shows that there are no intra- or inter­molecular π—π stacking inter­actions. The structure is stabilized by O—H...O hydrogen bonds involving the carbon­yl group and the solvent water mol­ecule.

The herbicide flumetsulam as the acetonitrile solvate

In the crystal structure of the title compound [systematic name: N-(2,6-difluoro­phen­yl)-5-meth­yl-1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide acetonitrile solvate], C₁₂H₉F₂N₅O₂S·C₂H₃N, the planar bicyclic triazolopyrimidine system is bound to the 2,6-difluoro­benzene group via an SO₂–NH bridge, the C—S—N—C torsion angle being −77.85 (18)°; the dihedral angle formed by the bicyclic triazolopyrimidine system and the benzene ring is 128.0 (2)°. N—H...N bonds link the mol­ecules into infinite chains running along the a axis of the crystal structure.

3-[3-(4-Chloro­phen­yl)-4-oxothia­zolidin-2-yl]-6-meth­yl-4H-benzopyran-4-one

The mol­ecular structure of the title compound, C₁₉H₁₄ClNO₃S, contains a 4-oxothia­zolidine ring in a near planar geometry.

2-(5-Benz­yl­oxy-2,4-dichloro­phen­yl)-4,5,6,7-tetra­hydro­isoindole-1,3-dione

The crystal structure of the title compound, C₂₁H₁₇Cl₂NO₃, shows that there are no intra- or inter­molecular π–π stacking inter­actions. The structure is stabilized by C—H...O and C—H...Cl hydrogen bonds, which form a nine-membered ring.

Ethyl 2-(5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidin-2-yl­oxy)benzoate

In the title compound, C₁₆H₁₆N₄O₃, which displays good herbicidal activity, the planar bicyclic triazolopyrimidine system is bound to an ethyl benzoate moiety via an oxo bridge, with a dihedral angle of 73.98 (2)° between the bicylic triazolopyrimidine system and the benzene ring. In the crystal structure, mol­ecules are linked by inter­molecular C—H...O hydrogen bonds and π–π stacking inter­actions between the triazolopyrimidine rings.