Hydrogen bonds: Hydrogen bonds are formed as a result of the attractive force occurring between a hydrogen atom which is already covalently bonded to a very electronegative atom like oxygen, fluorine, or nitrogen and another very electronegative atom like those. This other atom can be oxy...
Hydrogen bonds are ___ when the bonded molecules are oriented to maximize electrostatic interaction, which occurs when the hydrogen atom and the two atoms that share it are in a straight line—that is, when the acceptor atom is in line with the covalent bond between the donor atom...
In the crystal structure of ice, each oxygen atom is surrounded by four other oxygen atoms, with hydrogen atoms between them. Some of the hydrogen bonds are broken when ice melts, and the structure collapses with an increase in density. Hydrogen bonding is important in biology because of its...
Generally, the intermolecular forces are also known for determining the physical and chemical properties of the substance. Answer and Explanation: Water molecules rely on hydrogen bonds to hold them together. Hydrogen bonds are the bonds fo...
Hydrogen bondsare intermediate in terms of strength and length when compared tovan der waal's forcesandcovalent bonds. A hydrogen bond is mainly formed between a donor atoms such as an amine, which acts as a ligand, or a lewisbaseand acceptor atom likecarboxylic acid. The larger the number...
Unlike intramolecular hydrogen bonds, the formation of intermolecular hydrogen bonds is closely related to the chemical environment. Intermolecular hydrogen bonds are the result of intermolecular energy transfer and are inseparable from the molecular concentration. An insufficient concentration leads to excessive...
Oxygen stabilizes the metal particles present in the catalyst and promotes the gasification of coke, while the metal phases break the hydrocarbon bonds [8]. Non-noble metal-based catalysts are widely employed for ethanol reforming due to their relatively low cost and good activity for C-C and ...
In ice, the crystalline lattice is dominated by a regular array of hydrogen bonds which space the water molecules farther apart than they are in liquid water. This accounts for water's decrease in density upon freezing. In other words, the presence of hydrogen bonds enables ice to float, ...
Hydrogen and halogen bonds are compared on the basis ofab initiocalculations performed for complexes linked through these interactions. The Quantum Theory of Atoms in Molecules (QTAIM) and the Natural Bond Orbitals (NBO) method are applied for a deeper understanding of the nature of interactions. ...
2005. Are the hydrogen bonds of RNA (AU) stronger than those of DNA (AT)? A quantum mechanics study. Chemistry 11: 5062-5066.Perez, A.; Sˇ poner, J.; Jurecˇka, P.; Hobza, P.; Luque, F. J.; Orozco, M. Are the Hydrogen Bonds of RNA (A-U) Stronger than Those of DNA...