N-(4-Bromophenyl)-5,6-dichloronicotinamide and 6-Chloro-5-fluoro-N-(3-pyridyl)nicotinamide

The title compounds, N-(4-bromophenyl)-5,6-dichloronicotinamide, C₁₂H₇BrCl₂N₂O, and 6-chloro-5-fluoro-N-(3-pyridyl)-nicotinamide, C₁₁H₇ClFN₃O, crystallize as almost planar molecules held together by intermolecular hydrogen bonding. The dichloro compound shows C-Cl distances of 1.69 (2) and 1.725 (15) Å at C6 and C5, respectively. These compounds are representatives of a class of compounds biologically important as herbicidal, pesticidal or fungicidal agents.

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