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.

PDF Ino_Che_56-16_9669_2017.pdf - Published Version Restricted to Registered users only Download (3MB) | Request a copy

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
Publication:	INORGANIC CHEMISTRY
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
Date Deposited:	23 Sep 2017 05:05
Last Modified:	23 Sep 2017 05:05
URI:	http://eprints.iisc.ac.in/id/eprint/57871

Actions (login required)

View Item