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  • Title: Supramolecular structures of three isomeric 2-chloro-N-(nitrophenyl)nicotinamides.
    Author: de Souza MV, Vasconcelos TR, Wardell SM, Wardell JL, Low JN, Glidewell C.
    Journal: Acta Crystallogr C; 2005 Apr; 61(Pt 4):o204-8. PubMed ID: 15805626.
    Abstract:
    Molecules of 2-chloro-N-(2-nitrophenyl)nicotinamide, C12H8ClN3O3, are linked by two C-H...O hydrogen bonds into a chain of edge-fused R(2)(2) (14) and (4)(4) (24) rings. In 2-chloro-N-(3-nitrophenyl)nicotinamide monohydrate, C12H8ClN3O3.H2O, the molecules are linked by a combination of N-H...O, O-H...O and O-H...N hydrogen bonds into a chain of edge-fused rings containing two distinct types of R(4)(4) (16) ring. In 2-chloro-N-(4-nitrophenyl)nicotinamide, C12H8ClN3O3, which crystallizes with Z' = 2 in space group P2(1)/n, the molecules are linked by two N-H...N hydrogen bonds into simple C(2)(2) (12) chains.
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