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: BLYP/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 BLYP/cc-pCVTZ
 hartrees
Energy at 0K-239.051397
Energy at 298.15K 
HF Energy-239.051397
Nuclear repulsion energy76.080379
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 BLYP/cc-pCVTZ
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 2951 2951 47.70 124.59 0.09 0.16
2 A1 1486 1486 0.61 5.10 0.68 0.81
3 A1 1052 1052 89.41 3.84 0.29 0.45
4 A1 500 500 3.37 1.86 0.69 0.82
5 A2 1224 1224 0.00 8.10 0.75 0.86
6 B1 3016 3016 49.42 51.11 0.75 0.86
7 B1 1145 1145 15.47 1.99 0.75 0.86
8 B2 1413 1413 13.19 2.96 0.75 0.86
9 B2 1007 1007 230.50 2.38 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6897.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6897.1 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 BLYP/cc-pCVTZ
ABC
1.61871 0.34080 0.29845

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.509
H2 -0.918 0.000 1.112
H3 0.918 0.000 1.112
F4 0.000 1.121 -0.293
F5 0.000 -1.121 -0.293

Atom - Atom Distances (Å)
  C1 H2 H3 F4 F5
C11.09781.09781.37871.3787
H21.09781.83562.01812.0181
H31.09781.83562.01812.0181
F41.37872.01812.01812.2425
F51.37872.01812.01812.2425

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 113.438 H2 C1 F4 108.621
H2 C1 F5 108.621 H3 C1 F4 108.621
H3 C1 F5 108.621 F4 C1 F5 108.831
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pCVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.279      
2 H 0.053      
3 H 0.053      
4 F -0.192      
5 F -0.192      


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 1.806 1.806
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.452 0.000 0.000
y 0.000 -18.890 0.000
z 0.000 0.000 -15.382
Traceless
 xyz
x 1.684 0.000 0.000
y 0.000 -3.473 0.000
z 0.000 0.000 1.789
Polar
3z2-r23.578
x2-y23.438
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.216 0.000 0.000
y 0.000 2.507 0.000
z 0.000 0.000 2.344


<r2> (average value of r2) Å2
<r2> 40.238
(<r2>)1/2 6.343