Novel 3d-metal complexes with 1,2-diamino-3-(2-benzothiazolyl)-4(5H)-ketopyrrole: Synthesis,spectroscopic and structural investigations |
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| Authors: | Sergiy O Nikitin Rostyslav D Lampeka Yulian M Volovenko Gennady V Palamarchuk Oleg V Shishkin |
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| Institution: | 1. Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska Str. 64, Kyiv 01601, Ukraine;2. Division of Functional Materials Chemistry, STC, Institute for Single Crystals, National Academy of Sciences of Ukraine, Lenina Ave. 60, Kharkiv 61001, Ukraine;3. Department of Inorganic Chemistry, V.M. Karazin Kharkiv National University, Svobody Sq. 4, Kharkiv 61077, Ukraine |
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| Abstract: | A series of new 3d-metal complexes have been prepared by the reaction of M(CH3COO)2 (M = Zn(II), Co(II), Ni(II)) and 1,2-diamino-3-(2-benzothiazolyl)-4(5H)-ketopyrrole (HL) in a methanol (3) or a methanol/dmf (1, 2) medium. All the complexes have been studied by elemental analyses, electronic and IR spectroscopies. The zinc(II) complex 1 and the ligand HL have been investigated using the method of 1H NMR-spectroscopy at various temperatures. The disappearance of the signal from one proton of the amino group H(5) in the spectrum of complex 1 confirmed the existence of the ligand in the deprotonated form. According to the data of the 1H NMR-spectroscopy, the ligand HL is coordinated to zinc(II) through the nitrogen atom of the deprotonated amino group and the nitrogen atom of the benzothiazole substituent. These data are in agreement with X-ray structural studies for the ligand HL and the zinc(II) complex 1. |
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| Keywords: | 2-Amino-4(5H)-ketopyrrole 3d-metal complexes Spectroscopic investigation Crystal structure |
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