Separation of 4-Aminobenzoic acid (cas 150-13-0) by cocrystallization: Crystal structure of the complex of 4-Aminobenzoic acid (cas 150-13-0) with (2R,3R)-tartaric acid
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Add time:09/29/2019 Source:infona.pl
4-Aminobenzoic acid (cas 150-13-0) (PABA) has been successfully separated from a mixture containing 2-aminobenzoic acid and (2R,3R)-tartaric acid. X-ray structure analysis confirms the separating result. The molecular complex formed by PABA and tartaric acid in 1:1 molar ratio crystallizes in the orthorhombic space group P212121 with cell dimensions of a = 7.329(1) Å, b = 12.095(2) Å, c = 15.231(3) Å, V = 1350.1(4) Å3, Z = 4. The crystal structure comprises protonated PABA, monoanion of tartaric acid, and crystalline water. The extensive H-bonding network exists in the crystal structure. H bonding between tartaric acid and both terminal groups on para position of PABA is considered as a possible reason for the successful separation.
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