molecular interactions Flashcards
8/10/2018 | crowe chapter 4 importance of non-covalent interactions in biology polar bonds and molecules electrostatics hydrogen bonds van der Waals interactions steric effects the hydrophobic effect states of matter (20 cards)
what are hydrogen bonds?
hydrogen bonds are interactions between polar molecules
what is a polar molecule?
a polar molecule has a dipole
what are the two types of molecular interactions?
the two types of molecular interactions are:
- intRAmolecular interactions
- intERmolecular interactions
where do intramolecular interactions exist?
intramolecular interactions exist between separate parts of the same molecule
where do intermolecular interactions exist?
intermolecular interactions exist between different molecules
what are the six types of non-covalent interactions?
the six types of non-covalent interactions are: - dispersion forces - permanent dipolar interactions - steric repulsion - hydrogen bonds - ionic interactions - hydrophobic forces DHIPSH
in which direction is the arrow shown to be pointing from?
the arrow is shown to be pointing towards the less electron dense region (i.e from negative to positive)
which molecule are hydrogen bonds prominent in?
hydrogen bonds are prominent in water
what are hydrogen bonds described to be?
hydrogen bonds are described to be directional
why are hydrogen bonds described to be directional?
hydrogen bonds are described to be directional become they require some overlap of the atomic orbitals
what is the shape of the strongest hydrogen bonds?
the strongest hydrogen bonds are linear
what is the typical energy of hydrogen bonds?
the typical energy of hydrogen bonds is approximately 20kJ/mol
what is the overlap of atomic orbitals caused by in hydrogen bonds?
the overlap of atomic orbitals is caused by the non-bonding lone pair of electrons
what does the hydrogen bond line up with?
the hydrogen bond lines up with the lone pair
what are hydrogen bond donors?
hydrogen bond donors are hydrogen covalently bound to electronegative atoms
what is the symbol for hydrogen bond donors?
the symbol for hydrogen bond donors is δ+
what are hydrogen bond acceptors?
hydrogen bond acceptors are a lone pair of electrons
what is the symbol for hydrogen bond acceptors?
the symbol for hydrogen bond acceptors is δ-
what are salt bridges?
salt bridges are ionic forces in proteins
how strong are salt bridges?
salt bridges are roughly as strong hydrogen bonds
