4/16 orbitals Flashcards
what is valence bond theory
it describes bonding as two electrons that are shared between atoms in overlapping orbitals through a localized method of bonding
what is molecular orbital theory
atomic orbitals are combined to for molecular orbitals and then the molecular orbitals are filled with electrons
this is a delocalized picture of bonding
what is a symmetric bond/ even/ gerade?
on either side of the overlap, the orbitals are in phase with eachother (the same on either side)
what is a asymmetric bond/ odd/ ungerade
on the either side of the overlap, the orbitals are out of phase with each other (not the same on either side)
what is the sigma bonding orbital, g or u?
it is g, they are in phase
what is the sigma antibonding orbital, g or u?
it is u, they are out of phase
why do pi bonds u for bonding (uneven/asymmetric/odd) but g for antibonding when sigma bonds are u for antibonding and g for bonding?
pi bonds look different when existing in a 3D space, meanwhile sigma orbitals look the same
which has higher energy? the antibonding orbital or the bonding orbital
the antibonding orbital
what determines the bond length
a higher bond order will have a shorter bond length
a lower bond order will have a longer bond length
