作者:Fatma Aydın、Hüseyin Ünver、Doğan Aykaç、Nazan Ocak İskeleli
DOI:10.1007/s10870-010-9799-2
日期:2010.12
4-(3-Benzoylthioureido)benzoic acid has been synthesized from the reaction of 4-aminobenzoic acid with benzoyl isothiocyanate. The title compound has been characterized by elemental analysis, MS, FT-IR, 1H-NMR, 13C-NMR and UV–Visible techniques. The structure of the compound has also been examined crystallographically. The title compound crystallizes in the triclinic space group P-1 with a = 3.969(1), b = 13.039(1), c = 13.504(1) Å, α = 96.50(1)°, β = 92.25(1)°, γ = 94.94(1), V = 691.0(1) Å3 and D x = 1.444 g cm−3, respectively. The crystal structure has been solved by direct methods and refined by full-matrix least squares and found R 1 = 0.031 and wR 2 = 0.081 for 2909 observed reflections [I > 2σ(I)]. Thiourea and its derivatives have been widely used in research and technological applications such as in the pharmaceutical industry, as catalysts in chemical reactions and for extraction of toxic metals using a solid supported liquid membrane system. Furthermore these compounds have been used as ligands in the formation of metal complexes. In these complexes thiourea and its derivatives are coordinated to a metal ion either by the N or S atoms, by both of them or by other donor atoms available in the molecule. It has been shown to exist as tautomeric forms due to intramolecular proton shifts between the thioketo-sulfur and the amine-nitrogen, via intramolecular hydrogen bonding N–H···S or S–H···N.
4-(3-苯甲酰基硫脲基)苯甲酸通过4-氨基苯甲酸与苯甲酰基异硫氰酸酯的反应合成。该标题化合物通过元素分析、质谱、傅里叶变换红外光谱、氢核磁共振、碳核磁共振以及紫外-可见光谱技术进行了表征。该化合物的结构也通过晶体学方法进行了研究。标题化合物在三斜晶系空间群P-1中结晶,其晶格参数为:a = 3.969(1) Å,b = 13.039(1) Å,c = 13.504(1) Å,α = 96.50(1)°,β = 92.25(1)°,γ = 94.94(1)°,体积V = 691.0(1) ų,密度D x = 1.444 g cm−3。晶体结构通过直接法求解,并通过全矩阵最小二乘法精修,对于2909个观察到的反射[I > 2σ(I)],得到R 1 = 0.031和wR 2 = 0.081。硫脲及其衍生物广泛应用于研究和科技领域,如制药工业、作为化学反应的催化剂以及利用固体支撑液膜系统提取有毒金属。此外,这些化合物还被用作形成金属配合物的配体。在这些配合物中,硫脲及其衍生物通过氮或硫原子、两者或分子中的其他供电子原子与金属离子配位。由于硫酮硫和胺氮之间的分子内质子转移,通过分子内氢键N–H···S或S–H···N,已证明其存在互变异构形式。