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: 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-239.035124
Energy at 298.15K-239.037968
HF Energy-239.035124
Nuclear repulsion energy77.474164
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 3067 3067 45.29 112.98 0.09 0.16
2 A1 1537 1537 0.47 3.80 0.72 0.84
3 A1 1141 1141 104.07 4.11 0.25 0.40
4 A1 535 535 4.68 1.45 0.68 0.81
5 A2 1282 1282 0.00 6.81 0.75 0.86
6 B1 3138 3138 39.47 42.84 0.75 0.86
7 B1 1192 1192 17.65 1.31 0.75 0.86
8 B2 1467 1467 16.68 1.84 0.75 0.86
9 B2 1120 1120 250.97 2.57 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7240.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7240.2 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 mPW1PW91/Def2TZVPP
ABC
1.66465 0.35495 0.31055

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 0.499
H2 -0.910 0.000 1.101
H3 0.910 0.000 1.101
F4 0.000 1.098 -0.289
F5 0.000 -1.098 -0.289

Atom - Atom Distances (Å)
  C1 H2 H3 F4 F5
C11.09101.09101.35171.3517
H21.09101.81951.99161.9916
H31.09101.81951.99161.9916
F41.35171.99161.99162.1964
F51.35171.99161.99162.1964

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 112.992 H2 C1 F4 108.773
H2 C1 F5 108.773 H3 C1 F4 108.773
H3 C1 F5 108.773 F4 C1 F5 108.675
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 0.233      
2 H 0.085      
3 H 0.085      
4 F -0.202      
5 F -0.202      


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 1.869 1.869
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.195 0.000 0.000
y 0.000 -18.822 0.000
z 0.000 0.000 -15.238
Traceless
 xyz
x 1.835 0.000 0.000
y 0.000 -3.606 0.000
z 0.000 0.000 1.771
Polar
3z2-r23.541
x2-y23.627
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.178 0.000 0.000
y 0.000 2.433 0.000
z 0.000 0.000 2.299


<r2> (average value of r2) Å2
<r2> 39.041
(<r2>)1/2 6.248