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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: mPW1PW91/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/Def2TZVPP
 hartrees
Energy at 0K-634.965909
Energy at 298.15K 
HF Energy-634.965909
Nuclear repulsion energy192.856998
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at mPW1PW91/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3155 3155 0.00 91.89 0.05 0.09
2 A1 1415 1415 0.03 19.30 0.50 0.67
3 A1 505 505 0.17 18.48 0.09 0.16
4 A1 118 118 0.01 4.84 0.37 0.54
5 A2 1065 1065 0.00 0.80 0.75 0.86
6 B1 3245 3245 5.23 42.53 0.75 0.86
7 B1 728 728 7.70 0.75 0.75 0.86
8 B2 1145 1145 93.45 1.54 0.75 0.86
9 B2 604 604 47.89 6.94 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5989.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5989.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at mPW1PW91/Def2TZVPP
ABC
0.76260 0.02055 0.02009

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.045
I2 0.000 1.796 -0.090
I3 0.000 -1.796 -0.090
H4 -0.895 0.000 1.652
H5 0.895 0.000 1.652

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.12492.12491.08141.0814
I22.12493.59232.65772.6577
I32.12493.59232.65772.6577
H41.08142.65772.65771.7896
H51.08142.65772.65771.7896

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.408 I2 C1 H4 107.459
I2 C1 H5 107.459 I3 C1 H4 107.459
I3 C1 H5 107.459 H4 C1 H5 111.677
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.347      
2 I -0.025      
3 I -0.025      
4 H 0.198      
5 H 0.198      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.175 1.175
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -60.636 0.000 0.000
y 0.000 -60.092 0.000
z 0.000 0.000 -57.647
Traceless
 xyz
x -1.767 0.000 0.000
y 0.000 -0.951 0.000
z 0.000 0.000 2.718
Polar
3z2-r25.435
x2-y2-0.544
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.964 0.000 0.000
y 0.000 15.615 0.000
z 0.000 0.000 8.973


<r2> (average value of r2) Å2
<r2> 212.469
(<r2>)1/2 14.576