BIO 112 Chapter Notes - Chapter 1.3.1-1.3.3: Weak Interaction, Electronegativity, Covalent Bond
14 Sep 2015
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The three fundamental non-covalent bonds are: electrostatic interactions, hydrogen bonds and van der waals interactions. Electrostatic interactions: depends on the electric charge on the atoms and the energy of the interaction is given by the coulumb s law. Hydrogen bonds: are relatively weak interactions but are crucial for dna and protein bonding. Hydrogen atoms in hydrogen bonds are partly shared between two electronegative atoms such as n or o. hydrogen bond donor: group that includes both the atom in which the hydrogen is more tightly linked and hydrogen itself. Hydrogen bond acceptor: the atom less tightly linked to the hydrogen atom. Hydrogen atoms are like electrostatic interactions because hydrogen pulled more to one side will have a more negative charge. Hydrogen bonds weaker than covalent bonds but are longer than covalent bonds. Van der waals interactions: distribution of electronic charge around an atom changes with time.
