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Probst M, Injan N, Megyes T, Bako I, Balint S, Limtrakul J, Nazmutdinov R, Mitev PD, Hermansson K. A gold cyano complex in nitromethane: MD simulation and X-ray diffraction. Chem Phys Lett 2012; 539-540:24-29. [PMID: 25540462 PMCID: PMC4267153 DOI: 10.1016/j.cplett.2012.04.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2012] [Accepted: 04/20/2012] [Indexed: 11/29/2022]
Abstract
The solvation structure around the dicyanoaurate(I) anion (Au(CN)2-) in a dilute nitromethane (CH3NO2) solution is presented from X-ray diffraction measurements and molecular dynamics simulation (NVT ensemble, 460 nitromethane molecules at room temperature). The simulations are based on a new solute-solvent force-field fitted to a training set of quantum-chemically derived interaction energies. Radial distribution functions from experiment and simulation are in good agreement. The solvation structure has been further elucidated from MD data. Several shells can be identified. We obtain a solvation number of 13-17 nitromethane molecules with a strong preference to be oriented with their methyl groups towards the solute.
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Affiliation(s)
- Michael Probst
- Institute of Ion Physics and Applied Physics, Innsbruck University, Austria
| | - Natcha Injan
- Institute of Ion Physics and Applied Physics, Innsbruck University, Austria
- Department of Chemistry, Faculty of Science and Center of Nanotechnology, Kasetsart University, Bangkok, Thailand
| | - Tünde Megyes
- Chemical Research Centre of the Hungarian Academy of Sciences, Budapest, Hungary
| | - Imre Bako
- Chemical Research Centre of the Hungarian Academy of Sciences, Budapest, Hungary
| | - Szabolcz Balint
- Chemical Research Centre of the Hungarian Academy of Sciences, Budapest, Hungary
| | - Jumras Limtrakul
- Department of Chemistry, Faculty of Science and Center of Nanotechnology, Kasetsart University, Bangkok, Thailand
| | - Renat Nazmutdinov
- Kazan State Technological University, K. Marx Str. 68, 420015 Kazan, Republic Tatarstan, Russian Federation
| | - Pavlin D. Mitev
- Department of Chemistry, The Ångström Laboratory, Uppsala University, Box 531, S-75121 Uppsala, Sweden
| | - Kersti Hermansson
- Department of Chemistry, The Ångström Laboratory, Uppsala University, Box 531, S-75121 Uppsala, Sweden
- Department of Theoretical Chemistry, The Royal Institute of Technology (KTH), Roslagstullsbacken 15, S-106 91 Stockholm, Sweden
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