Record Details

<p>Synthesis, spectra and structure characterization of organic ammonium paratungstates</p>

Online Publishing @ NISCAIR

View Archive Info
 
 
Field Value
 
Authentication Code dc
 
Title Statement <p>Synthesis, spectra and structure characterization of organic ammonium paratungstates</p>
 
Added Entry - Uncontrolled Name Srinivasan, Bikshandarkoil R; GOA UNIVERSITY
UGC, New Delhi
 
Uncontrolled Index Term Synthetic and structural inorganic chemistry
tetraoxidotungstate; organic amine; paratungstate; Raman spectra; crystal structure
 
Summary, etc. Dissolution of tungstic acid in aqueous organic amine (RNH<sub>2</sub> where R = methyl or ethyl, or <em>n</em>-propyl or isopropyl, <em>n</em>-butyl, <em>t</em>-butyl etc.) results in the formation of the tetrahedral tetraoxidotungstate(VI) species in solution. Slow evaporation of the reaction mixture to isolate tetraoxidotungstates charge balanced by organic ammonium cations afforded organic ammonium paratungstates having  formula (RNH<sub>3</sub>)<sub>10</sub>[H<sub>2</sub>W<sub>12</sub>O<sub>42</sub>]·xH<sub>2</sub>O. The presence of [WO<sub>4</sub>]<sup>2-</sup> species in solution and the [H<sub>2</sub>W<sub>12</sub>O<sub>42</sub>]<sup>10</sup><sup>-</sup> unit in the solid product is confirmed by the characteristic Raman spectra. In this report, we describe the synthesis, Raman spectra, crystal structures and properties of two organic ammonium paratungstates <em>viz</em>. (MeNH<sub>3</sub>)<sub>10</sub>[H<sub>2</sub>W<sub>12</sub>O<sub>42</sub>]·12H<sub>2</sub>O <strong>1</strong> (MeNH<sub>2</sub> = methylamine) and (EtNH<sub>3</sub>)<sub>10</sub>[H<sub>2</sub>W<sub>12</sub>O<sub>42</sub>]·4H<sub>2</sub>O <strong>2 (</strong>EtNH<sub>2</sub> = ethylamine). A comparative study reveals a rich structural chemistry of paratungstate. Thermal decomposition of <strong>1</strong> and <strong>2</strong> results in the formation of crystalline monoclinic WO<sub>3</sub>.
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2021-02-25 16:31:05
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJCA/article/view/41182
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 60, ##issue.no## 2 (2021): INDIAN JOURNAL OF CHEMISTRY- SECTION A
 
Language Note en
 
Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/41182/465529384
http://op.niscair.res.in/index.php/IJCA/article/download/41182/465529386
 
Terms Governing Use and Reproduction Note Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India© 2015. The Council of Scientific &amp; Industrial Research, New Delhi.