Chapter 11: Valence Bond Theory Flashcards
VBT chemical bond definition
when overlap occrus between singly occupied atomic orbitals in the valence shell
what type of bonds are in VBT
covalent bonds
in VBT covalent bonds, what is shared in the overlapping orbitals
a pair of electrons
what is the relationship between amount of overlap and strength of bond?
the greater the amount of overlap, the stronger the bond
what is a sigma bond?
a direct overlap of atomic orbitals
what does hybridized mean?
mixed
what is a pi bond?
a side to side overlap of p-orbitals
what hybridization requires tetrahedral electron geometry?
4 sp3 orbitals
all single bonds are what kind of bond
sigma
what hybridization requires trigonal planar electron geometry
3 sp2 orbitals + 1 perpendicular p-orbital
what kind of bonds are in a double bond?
1 sigma bond and 1 pi bond
what type of rotation occurs around a sigma bond?
free rotation
when is rotation restricted?
when atoms are double (or more) bonded; sigma+pi bond
what hybridization requires linear electron geometry
2 sp hybrid orbitals + 2 perpendicular p orbitals
what type of bonds are in a triple bond?
1 sigma bond and 2 pi bonds
