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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: B2PLYP/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP/6-311G*
 hartrees
Energy at 0K-13876.959326
Energy at 298.15K 
HF Energy-13876.779306
Nuclear repulsion energy608.582377
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 B2PLYP/6-311G*
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 3164 3164 0.59 79.37 0.09 0.16
2 A1 1449 1449 0.06 20.02 0.52 0.69
3 A1 483 483 0.36 19.31 0.11 0.19
4 A1 118 118 0.02 6.16 0.41 0.59
5 A2 1097 1097 0.00 3.64 0.75 0.86
6 B1 3250 3250 2.42 49.34 0.75 0.86
7 B1 740 740 10.93 1.49 0.75 0.86
8 B2 1186 1186 120.12 0.35 0.75 0.86
9 B2 573 573 54.23 9.82 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6030.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6030.5 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 B2PLYP/6-311G*
ABC
0.75262 0.01969 0.01926

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.053
I2 0.000 1.835 -0.091
I3 0.000 -1.835 -0.091
H4 -0.894 0.000 1.663
H5 0.894 0.000 1.663

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.16212.16211.08221.0822
I22.16213.66962.69112.6911
I32.16213.66962.69112.6911
H41.08222.69112.69111.7877
H51.08222.69112.69111.7877

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.121 I2 C1 H4 107.353
I2 C1 H5 107.353 I3 C1 H4 107.353
I3 C1 H5 107.353 H4 C1 H5 111.364
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.766      
2 I 0.079      
3 I 0.079      
4 H 0.304      
5 H 0.304      


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 1.349 1.349
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.667 0.000 0.000
y 0.000 -64.270 0.000
z 0.000 0.000 -61.522
Traceless
 xyz
x -1.771 0.000 0.000
y 0.000 -1.176 0.000
z 0.000 0.000 2.947
Polar
3z2-r25.894
x2-y2-0.397
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.146 0.000 0.000
y 0.000 14.046 0.000
z 0.000 0.000 7.302


<r2> (average value of r2) Å2
<r2> 411.159
(<r2>)1/2 20.277