Hexaborate(2−) and Dodecaborate(6−) Anions as Ligands to Zinc(II) Centres: Self-Assembly and Single-Crystal XRD Characterization of [Zn{κ<sup>3</sup><i>O</i>-B<sub>6</sub>O<sub>7</sub>(OH)<sub>6</sub>}(κ<sup>3</sup><i>N</i>-dien)]·0.5H<sub>2</sub>O (dien = NH(CH<sub>2</sub>–CH<sub>2</sub>NH<sub>2</sub>)<sub>2</sub>), (NH<sub>4</sub>)<sub>2</sub>[Zn{κ<sup>2</sup><i>O</i>-B<sub>6</sub>O<sub>7</sub>(OH)<sub>6</sub>}<sub>2</sub> (H<sub>2</sub>O)<sub>2</sub>]·2H<sub>2</sub>O and (1,3-pnH<sub>2</sub>)<sub>3</sub>[(κ<sup>1</sup><i>N</i>-H<sub>3</sub>N{CH<sub>2</sub>}<sub>3</sub>NH<sub>2</sub>) Zn{κ<sup>3</sup><i>O</i>-B<sub>12</sub>O<sub>18</sub>(OH)<sub>6</sub>}]<sub>2</sub>·14H<sub>2</sub>O (1,3-pn = 1,3-diaminopropane)

Two zinc(II) hexaborate(2&#8722;) complexes, [Zn{&#954;<sup>3</sup><i>O</i>-B<sub>6</sub>O<sub>7</sub>(OH)<sub>6</sub>}(&#954;<sup>3</sup><i>N</i>-dien)]&#183;0.5H<sub>2</sub>O (dien = NH(...

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Bibliographic Details
Main Authors: Mohammed A. Altahan, Michael A. Beckett, Simon J. Coles, Peter N. Horton
Format: Article
Language:English
Published: MDPI AG 2019-03-01
Series:Inorganics
Subjects:
Online Access:https://www.mdpi.com/2304-6740/7/4/44
Description
Summary:Two zinc(II) hexaborate(2&#8722;) complexes, [Zn{&#954;<sup>3</sup><i>O</i>-B<sub>6</sub>O<sub>7</sub>(OH)<sub>6</sub>}(&#954;<sup>3</sup><i>N</i>-dien)]&#183;0.5H<sub>2</sub>O (dien = NH(CH<sub>2</sub>CH<sub>2</sub>NH<sub>2</sub>)<sub>2</sub>) (<b>1</b>) and (NH<sub>4</sub>)<sub>2</sub>[Zn{&#954;<sup>2</sup>O-B<sub>6</sub>O<sub>7</sub>(OH)<sub>6</sub>}<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>]&#183;2H<sub>2</sub>O (<b>2</b>), and a zinc(II) dodecaborate(6&#8722;) complex, (1,3-pnH<sub>2</sub>)<sub>3</sub>[(&#954;<sup>1</sup><i>N</i>-H<sub>3</sub>N{CH<sub>2</sub>}<sub>3</sub>NH<sub>2</sub>)Zn{&#954;<sup>3</sup><i>O</i>-B<sub>12</sub>O<sub>18</sub>(OH)<sub>6</sub>}]<sub>2</sub>&#183;14H<sub>2</sub>O (1,3-pn = 1,3-diaminopropane) (<b>3</b>), have been synthesized and characterized by single-crystal XRD studies. The complexes crystallized through self-assembly processes, from aqueous solutions containing 10:1 ratios of B(OH)<sub>3</sub> and appropriate Zn(II) amine complex: [Zn(dien)<sub>2</sub>](OH)<sub>2</sub>, [Zn(NH<sub>3</sub>)<sub>4</sub>](OH)<sub>2</sub>, and [Zn(pn)<sub>3</sub>](OH)<sub>2</sub>. The hexaborate(2&#8722;) anions in <b>1</b> and <b>2</b> are coordinated to octahedral Zn(II) centres as tridentate (<b>1</b>) or bidentate ligands (<b>2</b>) and the dodecaborate(6&#8722;) ligand in <b>3</b> is tridentate to a tetrahedral Zn(II) centre.
ISSN:2304-6740