Synthesis, Spectroscopic Studies and Structure of 2-[(Benzo[d]thiazol-2-ylamino)methyl]phenol
作者:Mustafa Yıldız、Hava Özay、Hüseyin Ünver、Nazan Ocak İskeleli、D. Mehmet Zengin、Tahsin Nuri Durlu
DOI:10.1007/s10870-010-9761-3
日期:2010.11
Schiff base (E)-2-[(benzo[d]thiazol-2-ylimino)methyl]phenol (1) has been synthesized from the reaction of 2-hydroxy-benzaldehyde with 2-aminobenzothiazole. The 2-[(benzo[d]thiazol-2-ylamino)methyl]phenol (2) was prepared reduction of the Schiff base 1 with sodium borohydride. The compounds 1 and 2 have been characterized by elemental analysis, FT-IR, 1H-NMR, 13C-NMR and UV–visible spectroscopic techniques. The structure of the compound 2 has also been examined crystallographically. The compound 2 crystallizes in the monoclinic space group P2/c. The unit cell parameters were found as a = 10.017(1), b = 11.725(1), c = 10.341(1) Å, V = 1208.1(1) Å3, D x = 1.409 g cm−3 and Z = 4. The crystal structure was solved by direct methods and refined by the full-matrix least squares method and found as R 1 = 0.0308 and wR 2 = 0.0818 for 2032 for the observed reflections [I > 2σ(I)]. Crystal and molecular structure of the compound 2-[(benzo[d]thiazol-2-ylamino)methyl]phenol have been studied in order to reveal the presence of either the enol-imine or keto-amine forms related with hydrogen bonding by using FT-IR, 1H-NMR, 13C-NMR, UV–visible spectroscopic and X-ray crystallographic techniques.
希夫碱 (E)-2-[(benzo[d]thiazol-2-ylimino)methyl]phenol (1) 由 2-hydroxy-benzaldehyde 与 2-aminobenzothiazole 反应合成。2-[(benzo[d]thiazol-2-ylamino)methyl]phenol (2) 是用硼氢化钠还原希夫碱 1 而制备的。化合物 1 和 2 已通过元素分析、傅立叶变换红外光谱、1H-NMR、13C-NMR 和紫外-可见光谱技术进行了表征。此外,还对化合物 2 的结构进行了晶体学研究。化合物 2 在单斜空间群 P2/c 中结晶。单胞参数为 a = 10.017(1), b = 11.725(1), c = 10.341(1) 埃,V = 1208.1(1) 埃3,D x = 1.409 g cm-3,Z = 4。晶体结构用直接法求解,并用全矩阵最小二乘法精炼,发现 2032 年观察到的反射[I > 2σ(I)]的 R 1 = 0.0308 和 wR 2 = 0.0818。利用傅立叶变换红外光谱、1H-核磁共振、13C-核磁共振、紫外-可见光谱和 X 射线晶体学技术,研究了 2-[(苯并[d]噻唑-2-基氨基)甲基]苯酚化合物的晶体和分子结构,以揭示与氢键有关的烯醇-亚胺或酮胺形式的存在。