RESUMEN
Transferrable force fields, based on n-6 Mie potentials, are presented for noble gases. By tuning the repulsive exponent, ni, it is possible to simultaneously reproduce experimental saturated liquid densities and vapor pressures with high accuracy, from the normal boiling point to the critical point. Vapor-liquid coexistence curves for pure fluids are calculated using histogram reweighting Monte Carlo simulations in the grand canonical ensemble. For all noble gases, saturated liquid densities and vapor pressures are reproduced to within 1% and 4% of experiment, respectively. Radial distribution functions, extracted from NVT and NPT Monte Carlo simulations, are in similarly excellent agreement with experimental data. The transferability of the optimized force fields is assessed through calculations of binary mixture vapor-liquid equilibria. These mixtures include argon + krypton, krypton + xenon, methane + krypton, methane + xenon, krypton + ethane, and xenon + ethane. For all mixtures, excellent agreement with experiment is achieved without the introduction of any binary interaction parameters or multi-body interactions.
RESUMEN
The title compound, C(16)H(22)O(3), is bent with a dihedral angle of 75.3â (1)° between the mean planes of the benzene ring and a group encompassing the ester functionality (O=C-O-C). In the crystal, the mol-ecules are linked into infinite chains held together by weak C-Hâ¯O hydrogen-bonded inter-actions between an H atom on the benzene ring of one mol-ecule and an O atom on the ketone functionality of an adjacent mol-ecule. The chains are arranged with neighbouring tert-butyl and dimethyl groups on adjacent chains exhibiting hydro-phobic stacking, with short C-Hâ¯H-C contacts (2.37â Å) between adjacent chains.