Shankar et al.: A second orthorhombic polymorph of 4-{[(1E,2E)-3-(4-methoxyphenyl)prop-2-en-1-ylidene]amino}-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one ##CrystalStructure##Aminoantipyrine##Acrylaldehyde... ##IUCrhttps://journals.iucr.org/paper?S2056989026001039
A second orthorhombic polymorph of 4-{[(1E,2E)-3-(4-methoxyphenyl)prop-2-en-1-ylidene]amino}-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one
A second orthorhombic polymorph of the title Schiff base crystallizes in space group Pna21, compared to Pbca for the first polymorph. The difference in the structure of the two polymorphs resides in the orientation of the 4-methoxy moiety of the (4-methoxyphenyl)allylidene unit.
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February 6, 2026 at 1:00 AM
Shankar et al.: A second orthorhombic polymorph of 4-{[(1E,2E)-3-(4-methoxyphenyl)prop-2-en-1-ylidene]amino}-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one ##CrystalStructure##Aminoantipyrine##Acrylaldehyde... ##IUCrhttps://journals.iucr.org/paper?S2056989026001039