Synthesis and Structure of Pb[C2O5] - An Inorganic Pyrocarbonate Salt
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-06-22 |
| Journal | Inorganic Chemistry |
| Authors | Dominik Spahr, Jannes Kƶnig, Lkhamsuren Bayarjargal, Rita Luchitskaia, Victor Milman |
| Institutions | Dassault SystĆØmes (United Kingdom), Goethe University Frankfurt |
| Citations | 28 |
Abstract
Section titled āAbstractāWe have synthesized Pb[C<sub>2</sub>O<sub>5</sub>], an inorganic pyrocarbonate salt, in a laser-heated diamond anvil cell (LH-DAC) at 30 GPa by heating a Pb[CO<sub>3</sub>] + CO<sub>2</sub> mixture to ā2000(200) K. Inorganic pyrocarbonates contain isolated [C<sub>2</sub>O<sub>5</sub>]<sup>2-</sup> groups without functional groups attached. The [C<sub>2</sub>O<sub>5</sub>]<sup>2-</sup> groups consist of two oxygen-sharing [CO<sub>3</sub>]<sup>3-</sup> groups. Pb[C<sub>2</sub>O<sub>5</sub>] was characterized by synchrotron-based single-crystal structure refinement, Raman spectroscopy, and density functional theory calculations. Pb[C<sub>2</sub>O<sub>5</sub>] is isostructural to Sr[C<sub>2</sub>O<sub>5</sub>] and crystallizes in the monoclinic space group <i>P</i>2<sub>1</sub>/<i>c</i> with <i>Z</i> = 4. The synthesis of Pb[C<sub>2</sub>O<sub>5</sub>] demonstrates that, just like in other carbonates, cation substitution is possible and that therefore inorganic pyrocarbonates are a novel family of carbonates, in addition to the established sp<sup>2</sup> and sp<sup>3</sup> carbonates.