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: TPSSh/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at TPSSh/daug-cc-pVTZ
 hartrees
Energy at 0K-239.082229
Energy at 298.15K-239.085041
HF Energy-239.082229
Nuclear repulsion energy76.847483
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 TPSSh/daug-cc-pVTZ
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 3048 3048 41.86 123.56 0.07 0.12
2 A1 1533 1533 0.26 3.23 0.72 0.83
3 A1 1101 1101 97.69 6.69 0.14 0.24
4 A1 517 517 4.37 1.19 0.61 0.76
5 A2 1262 1262 0.00 4.31 0.75 0.86
6 B1 3123 3123 32.76 44.73 0.75 0.86
7 B1 1176 1176 15.34 0.63 0.75 0.86
8 B2 1445 1445 10.81 0.70 0.75 0.86
9 B2 1061 1061 260.37 2.41 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7132.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7132.8 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 TPSSh/daug-cc-pVTZ
ABC
1.63278 0.34959 0.30555

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.508
H2 -0.915 0.000 1.102
H3 0.915 0.000 1.102
F4 0.000 1.107 -0.292
F5 0.000 -1.107 -0.292

Atom - Atom Distances (Å)
  C1 H2 H3 F4 F5
C11.09081.09081.36561.3656
H21.09081.82982.00132.0013
H31.09081.82982.00132.0013
F41.36562.00132.00132.2133
F51.36562.00132.00132.2133

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 114.012 H2 C1 F4 108.605
H2 C1 F5 108.605 H3 C1 F4 108.605
H3 C1 F5 108.605 F4 C1 F5 108.269
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.927      
2 H 0.226      
3 H 0.226      
4 F -0.690      
5 F -0.690      


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 1.932 1.932
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.559 0.000 0.000
y 0.000 2.893 0.000
z 0.000 0.000 2.705


<r2> (average value of r2) Å2
<r2> 39.610
(<r2>)1/2 6.294