Preparation and activity of metal complexes with heteroatomic organic ligands. Preliminary note

Various coordination compounds were prepared between transition metals (in particular copper, zinc, silver and cobalt) and benzotriazole 5-methylbenzotriazole, 2-methylbenzotriazole and 2-methylbenzimidazole. Compounds of this type present a significant herbicidal capacity both on monocotyledons and dicotyledons and some of them also present an antimicrobic activity. The method of preparation, the principal chemical characteristics and the analyses to determine the formulae are reported. It was observed that metal can coordinate with benzotriazole and its derivatives either as a neutral molecule (BTAH) or as a deprotonated anion (BTA-), or as a combination of both (BTAH and BTA-).