Midterm 3 Flashcards
What is the EDG of 2 electron groups?
Linear
What is the EDG of 3 electron groups?
Trigonal planar
What is the EDG of 4 electron groups?
Tetrahedral
What is the EDG of 5 electron groups?
Trigonal bipyramidal
What is the EDG of 6 electron groups?
Octahedral
What is the molecular geometry of an atom with 3 electron groups and 1 lone pair?
Bent (V-shaped)
What is the molecular geometry of an atom with 4 electron groups and 1 lone pair?
Trigonal pyramidal
What is the molecular geometry of an atom with 5 electron groups and 1 lone pair?
Seesaw (one axial lone pair)
What is the molecular geometry of an atom with 6 electron groups and 1 lone pair?
Square pyramidal
What is the molecular geometry of an atom with 4 electron groups and 2 lone pairs?
Bent (V-shaped)
What is the molecular geometry of an atom with 5 electron groups and 2 lone pairs?
T shaped (two axial lone pairs)
What is the molecular geometry of an atom with 6 electron groups and 2 lone pairs?
Square planar
What is the molecular geometry of an atom with 5 electron groups and 3 lone pairs?
Linear (3 axial lone pairs)
What is the bond angle of a linear molecular geometry?
180
What is the bond angle of a Trigonal planar molecular geometry?
120
What is the bond angle of a bent (v-shaped) molecular geometry?
Less than 120
What is the bond angle of a tetrahedral molecular geometry?
109.5
What is the bond angle of a trigonal pyramidal molecular geometry?
Less than 109.5
What is the bond angle of a bent (v-shaped) molecular geometry (steric number 4)?
Less than 109.5
What are the bond angles of a Trigonal bipyramidal molecular geometry?
90 from axial, 120 around center plane
What are the bond angles of a see-saw molecular geometry?
Less than 120 degrees
What are the bond angles of a T-shaped molecular geometry?
Less than 90 degrees
What are the bond angles of a linear molecular geometry (steric number 5)?
180
What is the bond angle of an octahedral molecular geometry?
90
Does an sp2 sp2 overlap develop into a sigma or pi bond?
Sigma
Does an sp2 1s overlap develop into a sigma or pi bond?
Sigma
What causes an pi bond?
Electrons in unhybridized orbitals (p orbitals) overlapping
What is the order of energy of MOs?
Sigma < pi < pi star < sigma star
Which elements use the inverted MO scheme?
Li, Be, B, C, or N
Constructive interference generates
Bonding orbitals
Destructive interference generates
Non bonding or anti bonding orbitals
The closer in energy AOs are
The more they mix to form MOs
Higher ___ means more stability
Q, ionic charge
What is the origin of hypervalency?
Atom size
What two orbitals are in the sp hybrid?
Ns and Npz
What orbitals are in the sp2 hybrid
Ns, npx, and npy
In bonding orbitals, the bigger orbital is on the ___ EN atom
More
In antibonds, the bigger orbital is on the ___ EN atom
Less
