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: PM3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at PM3
 hartrees
Energy at 0K 
Energy at 298.15K-0.158306
HF Energy-0.158306
Nuclear repulsion energy106.994148
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 PM3
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' 2878 2803 9.13 104.26 0.31 0.47
2 A' 1417 1380 295.89 54.82 0.55 0.71
3 A' 1092 1063 120.87 27.78 0.36 0.53
4 A' 678 660 130.17 86.69 0.33 0.50
5 A' 565 550 20.33 5.41 0.68 0.81
6 A' 400 390 1.95 8.23 0.47 0.64
7 A" 1572 1531 152.61 4.62 0.75 0.86
8 A" 1007 981 2.73 17.10 0.75 0.86
9 A" 365 355 3.15 8.17 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4986.2 cm-1
Scaled (by 0.974) Zero Point Vibrational Energy (zpe) 4856.5 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 PM3
ABC
0.34773 0.09357 0.07738

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM3

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.462 -0.927 0.000
H2 -1.567 -0.983 0.000
Br3 0.082 0.973 0.000
F4 0.082 -1.528 1.065
F5 0.082 -1.528 -1.065

Atom - Atom Distances (Å)
  C1 H2 Br3 F4 F5
C11.10631.97671.33831.3383
H21.10632.55822.03752.0375
Br31.97672.55822.71822.7182
F41.33832.03752.71822.1298
F51.33832.03752.71822.1298

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 108.851 H2 C1 F4 112.567
H2 C1 F5 112.567 Br3 C1 F4 108.632
Br3 C1 F5 108.632 F4 C1 F5 105.441
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability