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Back-Bonding Signature with High Pressure: Raman Studies on Silver Nitroprusside

Ghalsasi, Pallavi P and Ghalsasi, Prasanna S and Muthu, D V S (2017) Back-Bonding Signature with High Pressure: Raman Studies on Silver Nitroprusside. In: INORGANIC CHEMISTRY, 56 (16). pp. 9669-9675.

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Official URL: http://doi.org/10.1021/acs.inorgchem.7b01151

Abstract

In centrosymmetric molecules, like A(n+)M-(CN)(6)](n-) (where A is alkali metal cation), normally all stretching vibrations of cyanide (CN-) Shift to high frequency in response to nonhydrostatic pressure, whereas, in non-centrosymmetric molecules in whiCh one axial CN ligand is replaced by NO ligand, one observes unusual softening of only equatorial CN stretching modes. This effect is pronounced when A(+) is replaced by Ag+ with,difference in coordination ability of latter, resulting in expression of characteristic sign-attire of back-bonding. One can correlate this uneven stretching of cyanide to Poisson-like effect, where the axial Fe-N, Fe-C, and C-N stretching modes harden but the equatorial C-N stretching modes soften due to expansion at the equatorial plane. Thus, the present study is focused on results of non-hydrostatic high-pressure Raman measurements on silver nitroprusside tip to 11.5 GPa, for not only observing Characteristic signature of ``back-bonding'' interaction, rarely featured in literature, but also for generating reversible flexible structures akin to noncovalent interaction.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 23 Sep 2017 05:05
Last Modified: 23 Sep 2017 05:05
URI: http://eprints.iisc.ac.in/id/eprint/57871

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