Abstract
Abstract In the context of derivatisation studies of the pentaamine ligand 2,6-C5H3N[CMe(CH2NH2)2]2 (2-(6-(1,3-diamino-2-methylpropan-2-yl)pyridin-2-yl)-2-methylpropane-1,3-diamine, 1), we explored its zinc(II) coordination chemistry. With ZnBr2 in hot aqueous ethanol, in the absence of Lewis acid, the aqua complex [Zn(1)(H2O)]Br2 (2) is obtained, in which the pentaamine ligand acts as a square-pyramidal coordination cap. Single crystal structure data for the dihydrate of 2 are reported. In methanol solution, the complex is reactive towards carbon dioxide, and spectroscopic data (IR, 13C NMR) indicate the reversible formation of the dinuclear methyl carbonate complex [(Zn(1))2(μ2-(η1-O,η1-O)O2COCH3)]Br3.
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