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 CH3CBr3 (1,1,1-tribromoethane)

using model chemistry: MP2/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/STO-3G
 hartrees
Energy at 0K-7710.705768
Energy at 298.15K-7710.717421
HF Energy-7710.557083
Nuclear repulsion energy962.069832
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/STO-3G
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 3371 2939 0.21      
2 A1 1589 1386 0.92      
3 A1 1146 999 15.73      
4 A1 445 388 7.51      
5 A1 244 213 1.29      
6 A2 278 242 0.00      
7 E 3556 3101 0.01      
7 E 3556 3101 0.01      
8 E 1701 1483 0.55      
8 E 1701 1483 0.55      
9 E 1217 1061 48.94      
9 E 1217 1061 48.94      
10 E 788 687 51.58      
10 E 788 687 51.58      
11 E 288 251 0.06      
11 E 288 251 0.06      
12 E 163 142 0.45      
12 E 163 142 0.45      

Unscaled Zero Point Vibrational Energy (zpe) 11249.1 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 9808.1 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 MP2/STO-3G
ABC
0.03430 0.03430 0.02033

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.423
C2 0.000 0.000 2.003
Br3 0.000 1.868 -0.207
Br4 1.618 -0.934 -0.207
Br5 -1.618 -0.934 -0.207
H6 0.000 -1.038 2.380
H7 0.899 0.519 2.380
H8 -0.899 0.519 2.380

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.58001.97101.97101.97102.21562.21562.2156
C21.58002.89322.89322.89321.10431.10431.1043
Br31.97102.89323.23503.23503.89043.05293.0529
Br41.97102.89323.23503.23503.05293.05293.8904
Br51.97102.89323.23503.23503.05293.89043.0529
H62.21561.10433.89043.05293.05291.79751.7975
H72.21561.10433.05293.05293.89041.79751.7975
H82.21561.10433.05293.89043.05291.79751.7975

picture of 1,1,1-tribromoethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 109.989 C1 C2 H7 109.989
C1 C2 H8 109.989 C2 C1 Br3 108.627
C2 C1 Br4 108.627 C2 C1 Br5 108.627
Br3 C1 Br4 110.302 Br3 C1 Br5 110.302
Br4 C1 Br5 110.302 H6 C2 H7 108.949
H6 C2 H8 108.949 H7 C2 H8 108.949
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability