Intermolecular interactions: Hydrogen bonding Flashcards
in order for hydrogen bonding to occur, the hydrogen must be bonded to
a more electronegative atom than itself
the two types of hydrogen bonding are
intermolecular (between different molecules)
intramolecular (within the same molecule)
in order for an intermolecular interaction to be a hydrogen bond, there
must be evidence of some bond formation involving the hydrogen
some may say that the evidence of bond formation in intermolecular hydrogen bonding is proof that hydrogen bonding is
a bonded intermolecular interaction, though most say hydrogen bonding is a non-bonded intermolecular interaction
hydrogen bonding is most significant when
hydrogen is bonded to a very small, highly electronegative atoms such as oxygen, nitrogen and fluorine
all compounds containing an -O-H group form
intermolecular hydrogen bonds
in water, the hydrogen bond forms
between the oxygen atom of one water molecule and the hydrogen atom of a second water molecule
hydrogen bonds are not just an extreme dipole-dipole interaction, there is also
the partial bond formation utilising a lone pair of electrons on the oxygen atom
since the oxygen in water has two lone pairs, water molecules form
hydrogen bonds with two other water molecules
when drawing hydrogen bonds, we have to
make sure the hydrogen bond and the H-O bond with in one molecule is in a 180 degree angle with the O atom with which the hydrogen bond is formed
true or false: hydrogen bonding is the strongest of all intermolecular interactions
false. for some short chained molecules and water this is true, but not for longer chained alcohols or amines
all compounds containing an -N-H group can
form intermolecular hydrogen bonds
primary amines can
hydrogen bond
the only fluorine compound with intermolecular hydrogen bonding is
hydrogen fluoride
in hydrogen fluoride, the hydrogen bond forms
between the hydrogen in one HF molecule and a lone pair of electrons on he F atom of another HF molecule
