Replication of DNA strands is possible due to the presence of a hydrogen bond. The double-helical structure of DNA consists of hydrogen bonding between its base pairs. Carboxylic acids usually exist as dimeric pairs in non-polar media because of their tendency to “self-associate.” This tendency to hydrogen bond gives them increased stability as well as higher boiling points relative to the acid in an aqueous solution. Water consists of two hydrogen atoms attached via covalent bonds to one oxygen atom (H-O-H). This helps them to participate in hydrogen bonding. The presence of the hydroxyl group makes it hydrogen bond donors. Hydrogen bond is the result of interaction between the negative end of one molecule and the positive end of the other. The strength of the hydrogen bond increases with increasing acidity. Whereas the strength of van der Waal forces and covalent bond has 4 kJ/mol and 464 kJ/mol bond energies respectively. The strength of the hydrogen bonds is between 8 42 kJ/mol. Due to the presence of the carbonyl group, it acts as a hydrogen bond acceptor. The hydrogen bonds are intermediate in strength between van der Waals forces and covalent bonds. This leads to the formation of a partial negative charge \(\left( \right)\) attached to the same carbon atom.Ĭarboxylic acids act as both hydrogen bond acceptors and donors. As there is a large difference in the electronegativities of oxygen and hydrogen, the bonding pair of electrons lie very close to the oxygen atom.
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