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 CHBrF2 (Methane, bromodifluoro-)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-2796.438604
Energy at 298.15K-2796.443472
HF Energy-2796.071707
Nuclear repulsion energy249.714097
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 MP2/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3223 3076 31.10      
2 A' 1351 1289 128.98      
3 A' 1107 1057 217.15      
4 A' 682 651 109.92      
5 A' 542 518 12.56      
6 A' 294 281 0.60      
7 A" 1438 1372 31.52      
8 A" 1198 1144 135.07      
9 A" 294 280 2.07      

Unscaled Zero Point Vibrational Energy (zpe) 5064.3 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 4833.8 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 MP2/3-21G
ABC
0.31772 0.08970 0.07294

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.436 -0.956 0.000
H2 -1.519 -0.997 0.000
Br3 0.078 0.996 0.000
F4 0.078 -1.562 1.125
F5 0.078 -1.562 -1.125

Atom - Atom Distances (Å)
  C1 H2 Br3 F4 F5
C11.08362.01831.37821.3782
H21.08362.55392.03432.0343
Br32.01832.55392.79492.7949
F41.37822.03432.79492.2509
F51.37822.03432.79492.2509

picture of Methane, bromodifluoro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 Br3 106.944 H2 C1 F4 110.878
H2 C1 F5 110.878 Br3 C1 F4 109.299
Br3 C1 F5 109.299 F4 C1 F5 109.489
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability