Crystal and Molecular Structure of Two Organic Salts Formed Between 4-Phenylthiazol-2-amine and Mineral Acids Through Hydrogen Bond Interactions

Abstract

Two organic salts (4-phenylthiazol-2-amine)2:(sulfuric acid) [(HL1+)2·(SO4 2−)]·C2H5OH·H2O (1), and (4-phenylthiazol-2-amine):(hydrochloride acid) [HL1+·(Cl−)]·H2O (2) based on 4-phenylthiazol-2-amine (L1) were prepared and structurally characterized by X-ray crystallography. Compound 1 crystallizes in the monoclinic, space group C2/c, with a = 22.329(2) A, b = 9.6580(10) A, c = 24.484(3) A, β = 113.528(2)o, V = 4841.1(9) A3, Z = 8. For 1, the cations were connected through H2O molecules and the sulfate anions to form a 1D chain running along the b axis direction. Two such adjacent chains were joined together through π–π and O–H···O interactions along the c axis direction to generate a double chain structure. The double chains were further connected by N–H···O, N–H···S, and O–S interactions to form tetra-chain structure. The cations also form dimers via π–π interactions. On every chain of the tetramers there were bonded the cation dimers through C–H···O interactions. The cation dimers were sandwiched between the tetra-chains to form a 3D ABAB layer structure when viewed along the a axis direction. Compound 2 crystallizes in the monoclinic, space group P2(1)/c, with a = 12.6604(12) A, b = 9.1400(8) A, c = 10.1263(11) A, β = 110.2230(10)o, V = 1099.54(19) A3, Z = 4. In 2, the cations were connected by N–H···Cl, and S–Cl interactions to form a 1D chain extending along the b axis direction. Two neighboring chains were further connected by N–H···Cl hydrogen bonds to form a double chain structure. Adjacent double chains were stacked along the a axis direction through O–H···Cl hydrogen bonds to form a 3D layer network structure. Due to the weak interactions, the complex displays 3D network structure.