# Pressure dependence of \$^3^5Cl\$ nuclear quadrupole resonance in 2,5-, 2,6- and 3,5-dichlorophenols

Krishnamoorthy, TV and Krishnan, V and Ramakrishna, J (1985) Pressure dependence of \$^3^5Cl\$ nuclear quadrupole resonance in 2,5-, 2,6- and 3,5-dichlorophenols. In: Molecular Physics, 55 (1). pp. 121-128.

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## Abstract

Pressure dependence of \$^3^5Cl\$ Nuclear Quadrupole Resonances (N.Q.R.) in 2,5-, 2,6- and 3,5-dichlorophenols (DCP) has been studied up to a pressure of about 6·5 kbar at room temperature. While the pressure dependence of the two resonance lines in 2,6-DCP is essentially similar, the lower frequency line in 2,5-DCP is almost pressure independent and the higher frequency line shows a linear variation with pressure upto about 3·5 kbar but shows a negative pressure coefficient beyond this pressure. The two lines in 3,5-DCP have a non-linear pressure dependence with the curvature changing smoothly with pressure. The pressure coefficient for both lines becomes negative beyond a pressure of 5 kbar. The pressure dependence of the N.Q.R. frequencies is discussed in relation to intra- and inter-molecular contacts. Also, a thermodynamic analysis of the data is carried out to determine the constant volume temperature derivative of the N.Q.R. frequency.

Item Type: Journal Article Copyright of this article belongs to Taylor & Francis. Division of Physical & Mathematical Sciences > Physics 09 Jul 2008 27 Aug 2008 13:33 http://eprints.iisc.ernet.in/id/eprint/14852