Tetrakis(4‐amino‐1, 2, 4‐triazole)platinum(II) Salts: Syntheses, Crystal Structures, and Properties1. Issue 5 (12th February 2014)

• Record Type: Journal Article
• Authors: Carpenter, Julia A.; Dshemuchadse, Julia; Busato, Stephan; Bräunlich, Irene; Pöthig, Alexander; Caseri, Walter
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 640:Issue 5(2014)
• Page Start: 724
• Page End: 732
• Publication Date: 2014-02-12
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201300605
• Languages: English
• ISSNs: 0044-2313

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Transparent crystals comprising the nitrogen‐rich co­ordination unit [Pt(NH<sub>2</sub>trz)<sub>4</sub>]<sup>2+</sup> were synthesized with counterions of various sizes but of the same charge (–1), yielding the compounds [Pt(NH<sub>2</sub>trz)<sub>4</sub>]Cl<sub>2</sub><bold>·</bold>2H<sub>2</sub>O, [Pt(NH<sub>2</sub>trz)<sub>4</sub>](NO<sub>3</sub>)<sub>2</sub> and [Pt(NH<sub>2</sub>trz)<sub>4</sub>](CF<sub>3</sub>SO<sub>3</sub>)<sub>2</sub>, with NH<sub>2</sub>trz designating 4‐amino‐1, 2, 4‐triazole. Single‐crystal X‐ray diffraction analysis showed that NH<sub>2</sub>trz coordinates with only the nitrogen atom in 1‐position in all compounds. The [Pt(NH<sub>2</sub>trz)<sub>4</sub>]<sup>2+</sup> units are stacked such that the platinum atoms form linear arrays with Pt–Pt spacings mostly uncorrelated to anion size. The compound with the smallest anion (Cl<sup>–</sup>) has the smallest Pt–Pt spacing (4.72 Å) and shows a quasi‐one‐dimensional structure. Thermal decomposition of the compounds was observed around 200 °C. Electrical conductivity of [Pt(NH<sub>2</sub>trz)<sub>4</sub>]Cl<sub>2</sub> and [Pt(NH<sub>2</sub>trz)<sub>4</sub>](SO<sub>3</sub>CF<sub>3</sub>)<sub>2</sub> was investigated and found to be humidity‐dependent. Finally, [Pt(NH<sub>2</sub>trz)<sub>4</sub>]<sup>2+</sup> ions obtained by dissolution of the chloride salt are shown to be useful for the synthesis of new compounds such as the Magnus' salt derivative [Pt(NH<sub>2</sub>trz)<sub>4</sub>][PtCl<sub>4</sub>].</p> </abstract>