Microwave Spectroscopic and Atoms in Molecules Theoretical Investigations on the ArPropargyl Alcohol Complex: ArHO, Ar, and ArC Interactions

Mani, Devendra and Arunan, Elangannan (2013) Microwave Spectroscopic and Atoms in Molecules Theoretical Investigations on the ArPropargyl Alcohol Complex: ArHO, Ar, and ArC Interactions. In: CHEMPHYSCHEM, 14 (4, SI). pp. 754-763.

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Abstract

The structure of the Arpropargyl alcohol (ArPA) complex is determined from the rotational spectra of the parent complex and its two deuterated isotopologues, namely ArPA-D(OD) and ArPA-D(CD). The spectra confirm a geometry in which PA exists in the gauche form with Ar located in between OH and CCH groups. All a, b and c types of transitions show small splitting due to some large-amplitude motion dominated by COH torsion, as in the monomer. Splittings in a- and b-type transitions are of the order of a few kilohertz, whereas splitting in the c-type transitions is relatively larger (0.92.6 MHz) and decreases in the order ArPA>ArPA-D(CD)>ArPA-D(OD). The assignments are well supported by ab initio calculations. Atoms in molecules (AIM) and electrostatic potential calculations are used to explore the nature of the interactions in this complex. AIM calculations not only reveal the expected OHAr and Ar interactions in the Argauche-PA complex, but also novel CAr (of CH2OH group) and OHAr interactions in the Artrans-PA complex. Similar interactions are also present in the Armethanol complex.

Item Type:	Journal Article
Publication:	CHEMPHYSCHEM
Publisher:	WILEY-V C H VERLAG GMBH
Additional Information:	Copyright for this article belongs to the WILEY-V C H VERLAG GMBH, GERMANY.
Keywords:	argon complexes; atoms in molecules theory; hydrogen bonds; intermolecular interactions; microwave spectroscopy
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	22 Apr 2013 06:54
Last Modified:	22 Apr 2013 06:54
URI:	http://eprints.iisc.ac.in/id/eprint/46433

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