âSorry for the paucity of posts over the past few days but I'm in a state of upheaval known as âjob changeâ.â âThere is no scheme in all these projects to solve the paucity of clean, safe drinking water.â âThe paucity of these qualities in the present Republic would stagger them.â
Benzene is the archetypical aromatic compound. It is planar, bond angles=120Âº, all carbon atoms in the ring are sp2 hybridized, and the pi-orbitals are occupied by 6 electrons. The aromatic heterocycle pyridine is similar to benzene, and is often used as a weak base for scavenging protons.
Specifically, the MD simulations of S&vdV confirm that: (a) the benzeneâwater van der Waals interaction energy overwhelms in magnitude the work of cavity creation; (b) the enthalpic contribution of the weak benzeneâwater H-bonds is to a large extent compensated for by a corresponding entropic contribution.n order to address the role played by the weak benzeneâwater H-bonds, S&vdV studied a real benzene model that favors the formation of such weak H-bonds as well as a van der Waals, vdW, benzene model obtained by removing all partial charges of the first model and keeping the dispersion interactions unaffected.