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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: B97D3/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B97D3/3-21G
 hartrees
Energy at 0K-13828.103715
Energy at 298.15K 
HF Energy-13828.103715
Nuclear repulsion energy593.247702
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 B97D3/3-21G
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 3101 3049 2.14 100.75 0.08 0.15
2 A1 1437 1412 0.00 30.50 0.65 0.79
3 A1 452 444 0.98 17.13 0.17 0.28
4 A1 114 112 0.01 11.32 0.47 0.64
5 A2 1073 1054 0.00 14.94 0.75 0.86
6 B1 3198 3144 0.01 61.77 0.75 0.86
7 B1 725 713 13.96 5.41 0.75 0.86
8 B2 1159 1140 114.72 0.14 0.75 0.86
9 B2 527 518 109.52 9.13 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5893.4 cm-1
Scaled (by 0.983) Zero Point Vibrational Energy (zpe) 5793.2 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 B97D3/3-21G
ABC
0.73019 0.01866 0.01826

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.072
I2 0.000 1.885 -0.092
I3 0.000 -1.885 -0.092
H4 -0.906 0.000 1.678
H5 0.906 0.000 1.678

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.21552.21551.09061.0906
I22.21553.77002.74052.7405
I32.21553.77002.74052.7405
H41.09062.74052.74051.8125
H51.09062.74052.74051.8125

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.608 I2 C1 H4 106.996
I2 C1 H5 106.996 I3 C1 H4 106.996
I3 C1 H5 106.996 H4 C1 H5 112.395
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.899      
2 I 0.158      
3 I 0.158      
4 H 0.292      
5 H 0.292      


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 1.396 1.396
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -63.390 0.000 0.000
y 0.000 -63.129 0.000
z 0.000 0.000 -60.553
Traceless
 xyz
x -1.549 0.000 0.000
y 0.000 -1.158 0.000
z 0.000 0.000 2.706
Polar
3z2-r25.412
x2-y2-0.261
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.495 0.000 0.000
y 0.000 13.150 0.000
z 0.000 0.000 4.988


<r2> (average value of r2) Å2
<r2> 430.667
(<r2>)1/2 20.753