Crystal structure of 1,4-dihydro-1-phenylchromeno[4,3-c]pyrazole, C₁₆H₁₂N₂O

Abstract

The asymmetric unit of the title crystal structure is shown in the gure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters. Source of materialTo a solution of (E)-3-((dimethylamino)methylene)-2,3-dihydrochromen-4-one (0.2 g, 1 mmol) in glacial acetic acid (10 mL) was added the phenyl hydrazine (1 mmol). The reaction mixture was heated under re ux for 4-6 h, then allowed to cool and poured into ice-cold solution of sodium bicarbonate. δ: 61.28, 114.63, 116.22, 117.74, 121.44, 122.65, 125.39, 128.81, 129.38, 129.52, 133.71, 134.83, 140.34, 153.90 , 4.87; N, 11.28. Found: C, 77.57 ; H, 4.95; N, 11.35 [13]. Experimental detailsAll hydrogen atoms were positioned geometrically C-H = 0.95 Å and re ned as riding atoms with U iso = 1.2Ueq(C).