Exploration of intermolecular interaction of calf thymus DNA with sulfosulfuron using multi-spectroscopic and molecular docking techniques
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Docking (animal)
Intermolecular interaction
The current views on the nature of the intermolecular interaction and the interchain organisation of polymers in the rubber-elastic state are described. The possibility of representing the system of intermolecular interactions by an infinite network of physical links (the physical network model) is considered. Polymeric physical networks are compared with associated species formed in low-molecular-mass organic compounds containing localised intermolecular interaction centres. The principal physical properties of polymers are analysed on the basis of the physical network model. The bibliography includes 280 references.
Intermolecular interaction
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One of the most familiar carbon-centered noncovalent interactions (NCIs) involving an antibonding π*-orbital situated at the Bürgi-Dunitz angle from the electron donor, mostly lone pairs of electrons, is known as n → π* interactions, and if it involves a σ* orbital in a linear fashion, then it is known as the carbon bond. These NCIs can be intra- or inter-molecular and are usually weak in strength but have a paramount effect on the structure and function of small-molecular crystals and proteins. Surprisingly, the experimental evidence of such interactions in the solution phase is scarce. It is even difficult to determine the interaction energy in the solution. Using NMR spectroscopy aided with molecular dynamics (MD) simulation and high-level quantum mechanical calculations, herein we provide the experimental evidence of intermolecular carbon-centered NCIs in solution. The challenge was to find appropriate heterodimers that could sustain room temperature thermal energy and collisions from the solvent molecules. However, after several trial model compounds, the pyridine-N-oxide:dimethyltetracyanocyclopropane (PNO-DMTCCP) complex was found to be a good candidate for the investigation. NBO analyses show that the PNO:DMTCCP complex is stabilized mainly by intermolecular n → π* interaction when a weaker carbon bond gives extra stability to the complex. From the NMR study, it is observed that the NCIs between DMTCCP and PNO are enthalpy driven with an enthalpy change of -28.12 kJ mol-1 and dimerization energy of ∼-38 kJ mol-1 is comparable to the binding energies of a conventional hydrogen-bonded dimer. This study opens up a new strategy to investigate weak intermolecular interactions such as n → π* interaction and carbon bonds in the solution phase.
Intermolecular interaction
Non-covalent interactions
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Carbon fibers
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The systematic ab initio studies of intermolecular interaction energy components in the model unsaturated hydrocarbon complexes have been performed. The influence of the weak intermolecular interactions on the optical properties has been analyzed within the supermolecular approach. The estimated interaction energy components and electric properties of the studied systems indicate the substantial influence of the intermolecular forces on the optical response of the studied systems. The obtained results could be important for understanding the properties of the organic materials exploited for the purposes of the nonlinear optics.
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Intermolecular interaction
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Intermolecular interaction
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Abstract Closely related structures, like esters and lactones, have vastly different physical properties. This is apparently due to differences in the intermolecular interactions. The intermolecular interactions of methyl acetate, β‐propiolactone, ethyl acetate, and γ‐butyrolactone have been studied using the AM1 semiempirical method. Some of the “arranged clusters” were also compared to possible covalently bound trimers and tetramers of β‐propiolactone and γ‐butyrolactone. © 1992 John Wiley & Sons, Inc.
Methyl acetate
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