return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: wB97X-D/cc-pCVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at wB97X-D/cc-pCVTZ
 hartrees
Energy at 0K-239.014856
Energy at 298.15K 
HF Energy-239.014856
Nuclear repulsion energy77.455904
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 wB97X-D/cc-pCVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3057 3057 46.66 115.54 0.08 0.16
2 A1 1544 1544 0.58 4.49 0.71 0.83
3 A1 1140 1140 105.08 3.49 0.28 0.44
4 A1 538 538 4.63 1.48 0.68 0.81
5 A2 1288 1288 0.00 6.85 0.75 0.86
6 B1 3127 3127 43.08 44.92 0.75 0.86
7 B1 1197 1197 18.74 1.36 0.75 0.86
8 B2 1476 1476 17.38 2.14 0.75 0.86
9 B2 1119 1119 244.75 2.51 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7242.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7242.2 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 wB97X-D/cc-pCVTZ
ABC
1.66496 0.35468 0.31034

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/cc-pCVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.499
H2 -0.909 0.000 1.102
H3 0.909 0.000 1.102
F4 0.000 1.099 -0.289
F5 0.000 -1.099 -0.289

Atom - Atom Distances (Å)
  C1 H2 H3 F4 F5
C11.09121.09121.35191.3519
H21.09121.81881.99211.9921
H31.09121.81881.99211.9921
F41.35191.99211.99212.1973
F51.35191.99211.99212.1973

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 112.906 H2 C1 F4 108.786
H2 C1 F5 108.786 H3 C1 F4 108.786
H3 C1 F5 108.786 F4 C1 F5 108.714
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/cc-pCVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.329      
2 H 0.032      
3 H 0.032      
4 F -0.197      
5 F -0.197      


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 1.853 1.853
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.103 0.000 0.000
y 0.000 -18.647 0.000
z 0.000 0.000 -15.098
Traceless
 xyz
x 1.770 0.000 0.000
y 0.000 -3.546 0.000
z 0.000 0.000 1.777
Polar
3z2-r23.554
x2-y23.544
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.108 0.000 0.000
y 0.000 2.332 0.000
z 0.000 0.000 2.214


<r2> (average value of r2) Å2
<r2> 38.974
(<r2>)1/2 6.243