Abstract
The complete mol-ecule of the hexa-metallic title complex, namely, tetra-bromido-tetra-μ-hydroxido-hexa-kis-[μ-2-methyl-3-(pyrrolidin-1-yl)propan-2-olato]hexa-zinc(II) acetone disolvate, [Zn6Br4(C9H18NO)4(OH)4]·2C3H6O2, is generated by a crystallographic centre of symmetry. Two of the unique zinc atoms adopt distorted ZnO2NBr tetra-hedral coordination geometries and the other adopts a ZnO3N tetra-hedral arrangement. Both unique alkoxide ligands are N,O-chelating and both hydroxide ions are μ2 bridging. The crystal structure displays an O-H⋯O hydrogen bond between a μ2-OH group and an acetone solvent mol-ecule. The Hirshfeld surface has been calculated and is described.
Highlights
The complete molecule of the hexametallic title complex, namely, tetrabromidotetra--hydroxido-hexakis[-2-methyl-3-(pyrrolidin-1-yl)propan-2-olato]hexazinc(II) acetone disolvate, [Zn6Br4(C9H18NO)4(OH)4]Á2C3H6O2, is generated by a crystallographic centre of symmetry
Zinc complexes have a wide range of applications
Zinc alkoxides find applications in many fields. They are used in organic catalysis, for example in the amplification of an enantiomer through an autocatalytic cycle by building a tetrameric zinc alkoxide as an intermediate (Shibata et al, 1997; Soai et al, 1995)
Summary
Zinc complexes have a wide range of applications. For example they can be found as catalysts in organic chemistry or in the human body in enzymes, such as oxidoreductases, transferases, hydrolases, lyases, isomerases and ligases (Lipscomb & Strater, 1996). The bond angles in (I) are as expected (Table 1), apart from the O—Zn—N angles: these are significantly compressed from the ideal tetrahedral values with O1—Zn1— N1 = 88.54 (4) and O4—Zn2—N2 = 86.91 (4), presumably because of the rigid structure of the aminoalkoxide and the higher steric demand of the tetrahedral nitrogen atom. This is supported by a similar compound in the literature with an O— Zn—N angle of 94.1 (1) (Chen et al, 2014). The disorder of just one methyl group of an acetone molecule has already been reported in the literature (Arias et al, 2013; Balogh-Hergovich et al, 1998)
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