Chapter 9 Flashcards
what type of hybridization gives a trigonal planar arrangement
sp2
what arrangement has d2sp3 hybridization
octahedral
how many unhybridized orbital are in a tetrahedral arrangement and what kind
none
what hybridization gives a linear arrangement
sp
what hybridization gives a trigonal bipyramidal arrangement
dsp3
how many unhybridized orbital are in a trigonal bipyramidal arrangement and what kind
4 d orbitals
how many unhybridized orbital are in an octahedral arrangement and what kind
3 d orbitals
define a sigma bond
bond where electron are shared within a center space between atoms
define a pi bond
bond that occur in double/triple bond where electrons are shared in space above/below of sigma bonds
what kinds of orbital overlap are pi and sigma bonds
sigma= end on overlap
pi= side to side overlap
what rules must be followed in molecular orbital model
1- orbitals are conserved so nb of atomic orbitals=nb of molecular orbitals
2- stable molecules have low energy
3- each MO can only contain two electrons of opposite spin
how are molecular orbitals formed
when atomic orbitals overlap
define bonding MO
orbital that concentrated between two nuclei, since they result from an addition of atomic orbitals
have low energy and represented by sigma
define antibonding MO
substraction of atomic orbitals that result in a zero value area where there is low density.
space between nuclei=node
forces electron to be higher in energy
what is the bond order formula
1/2(nb of electrons in Bonding MO - nb of electron in AB MO)
