| X-ray Analysis of Intermolecular Interactions in Liquid 2-chloronaphthalene at 353 K |
| H. Drozdowski Adam Mickiewicz University, Faculty of Physics Faculty Laboratory of Structural Research, Umultowska 85, 61-614 Poznań, Poland |
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| Received: October 8, 2002; revised version May 15, 2003; in final form July 30, 2003 |
| The aim of the study was to examine the structure of liquid 2-chloronaphthalene C 10 H 7 -Cl at 353 K by the X-ray diffraction method. Monochromatic radiation Mo K α,λ = 0.71069 A was used to determine the scattered radiation intensity between S min =4πsinϑ min /λ=0.430 A -1 and S max =4πsinϑ max /λ=14.311 A -1 . The curves of reduced intensity were analysed by the reduction method of Blum and Narten. Experimental distribution of X-ray scattered intensity was compared with theoretical results predicted for a proposed model of 2-chloronaphthalene molecule. The differential radial distribution function 4πr 2 Σ j,k n <K j [ρ k (r)-ρ 0 ]> was calculated and some intra- and intermolecular distances in liquid 2-chloronaphthalene were determined. X-ray structural analysis was applied to determine the packing coefficient of 2-chloronaphthalene molecules at 353 K. The intermolecular distance Cl...Cl' was also determined as 7.90±0.15 A. A simple model of short-range arrangement of the molecules was proposed, which seems to be valid for other weakly polar monosubstituted naphthalene derivatives in the liquid phase. |
| DOI: 10.12693/APhysPolA.104.441 PACS numbers: 61.25.Em |