Molecular cocrystals of carboxylic acids. XXXII - The crystal structures of the adducts of 2-aminobenzothiazole with 3,5-dinitrobenzoic acid (adduct hydrate) and 3-aminobenzoic acid, and 2-amino-2-thiazoline with 2-aminobenzoic acid

摘要

Two adducts of 2-aminobenzothiazole and one of 2-amino-2-thiazoline with aromatic carboxylic acids have been synthesized and their X-ray crystal. structures determined. These are 2-aminobenzothiazole with 3,5-dinitrobenzoic acid (the 1:1 adduct hydrate) (1), and 3-aminobenzoic acid (1:1) (2), and 2-amino-2-thiazoline with 2-aminobenzoic acid (1:1) (3). Compound (1) is a non-centrosymmetric proton-transfer complex and gave a signal of 0.30 relative to urea when tested for second-order non-linear optical properties. Compound (3) is also a proton-transfer complex but (2) is not. [References: 10]