BIOCHEM 3G03 Chapter Notes - Chapter 2: Van Der Waals Radius, London Dispersion Force, Relative Permittivity
5 Oct 2016
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Document Summary
Neighbouring water molecules align positive hydrogen to negative oxygen and forms a hydrogen bond. Each water molecule can potentially participate in 4 hydrogen bonds: two hydrogen atoms to donate to a hydrogen bond and two pairs of unshared electrons to accept a hydrogen bond. Ice : water forms 4 bonds with other molecules. Liquid water: the structure of water is continually flickering as water molecules rotate, bend, and reorient themselves. Theory suggests that water molecules participate in two strong hydrogen bonds, one as a donor and one as an acceptor. Water is less dense than other liquids. Hydrogen bonds are one type of electrostatic force. Ionic interactions are intermediate in strength to covalent bonds and hydrogen bonds. Hydrogen bond considered as a type of electrostatic interaction. Van der waals radii : distance from its nucleus to its effective electronic surface. N--h, o--h, s--h groups are hydrogen donors and electronegative n, o, or s atoms as hydrogen acceptors.
