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All results from a given calculation for CH2F2 (Methane, difluoro-)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-237.590016
Energy at 298.15K 
HF Energy-237.590016
Nuclear repulsion energy75.499870
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 B3PW91/3-21G*
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 3059 2934 47.41      
2 A1 1597 1533 2.22      
3 A1 1093 1049 72.83      
4 A1 496 476 6.30      
5 A2 1275 1224 0.00      
6 B1 3111 2984 82.35      
7 B1 1167 1120 14.21      
8 B2 1507 1446 32.63      
9 B2 1138 1092 139.77      

Unscaled Zero Point Vibrational Energy (zpe) 7221.2 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 6928.0 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 B3PW91/3-21G*
ABC
1.62000 0.33304 0.29192

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.507
H2 -0.901 0.000 1.127
H3 0.901 0.000 1.127
F4 0.000 1.135 -0.294
F5 0.000 -1.135 -0.294

Atom - Atom Distances (Å)
  C1 H2 H3 F4 F5
C11.09401.09401.38921.3892
H21.09401.80262.02972.0297
H31.09401.80262.02972.0297
F41.38922.02972.02972.2707
F51.38922.02972.02972.2707

picture of Methane, difluoro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 110.941 H2 C1 F4 109.065
H2 C1 F5 109.065 H3 C1 F4 109.065
H3 C1 F5 109.065 F4 C1 F5 109.626
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.190      
2 H 0.204      
3 H 0.204      
4 F -0.299      
5 F -0.299      


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 1.989 1.989
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.927 0.000 0.000
y 0.000 -18.675 0.000
z 0.000 0.000 -14.702
Traceless
 xyz
x 1.761 0.000 0.000
y 0.000 -3.860 0.000
z 0.000 0.000 2.099
Polar
3z2-r24.198
x2-y23.748
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.569 0.000 0.000
y 0.000 1.730 0.000
z 0.000 0.000 1.600


<r2> (average value of r2) Å2
<r2> 40.518
(<r2>)1/2 6.365