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The crystal structures of the disordered hemi-DMSO solvate of ( E )-2-oxo- N '-(3,4,5-tri-meth-oxy-benzyl-idene)-2 H -chromene-3-carbohydrazide, C 20 H 18 N 2 O 6 ·0.5C 2 H 6 OS, and ( E )- N '-benzyl-idene-2-oxo-2 H -chromene-3-carbohydrazide, C 17 H 12 N 2 O 3 ( 4 : R = C 6 H 5 ), are discussed. The non-hydrogen atoms in compound [ 4 : R = (3,4,5-MeO) 3 C 6 H 2 )] exhibit a distinct curvature, while those in compound, ( 4 : R = C 6 H 5 ), are essential coplanar. In ( 4 : R = C 6 H 5 ), C-H⋯O and π-π intra-molecular inter-actions combine to form a three-dimensional array. A three-dimensional array is also found for the hemi-DMSO solvate of [ 4 : R = (3,4,5-MeO) 3 C 6 H 2 ], in which the mol-ecules of coumarin are linked by C-H⋯O and C-H⋯π inter-actions, and form tubes into which the DMSO mol-ecules are cocooned. Hirshfeld surface analyses of both compounds are reported, as are the lattice energy and inter-molecular inter-action energy calculations of compound ( 4 : R = C 6 H 5 ).

acta crystallographica. section e, crystallographic communications

Crystal structures and Hirshfeld surface analyses of (E)-N′-benzylidene-2-oxo-2H-chromene-3-carbohydrazide and the disordered hemi-DMSO solvate of (E)-2-oxo-N′-(3,4,5-trimethoxybenzylidene)-2H-chromene-3-carbohydrazide: lattice energy and intermolecular interaction energy calculations for the former