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All results from a given calculation for CH3CBr3 (1,1,1-tribromoethane)

using model chemistry: MP2=FULL/3-21G*

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=FULL/3-21G*
 hartrees
Energy at 0K-7758.469791
Energy at 298.15K-7758.481613
HF Energy-7757.847270
Nuclear repulsion energy975.858796
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=FULL/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 A1 3101 2940 0.99      
2 A1 1498 1420 11.28      
3 A1 1040 985 4.21      
4 A1 423 401 5.35      
5 A1 219 208 0.15      
6 A2 325 308 0.00      
7 E 3192 3026 1.51      
7 E 3192 3026 1.51      
8 E 1576 1494 4.80      
8 E 1576 1494 4.80      
9 E 1171 1111 45.13      
9 E 1171 1111 45.14      
10 E 683 647 65.58      
10 E 683 647 65.58      
11 E 280 266 0.84      
11 E 280 266 0.84      
12 E 152 144 0.10      
12 E 152 144 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 10356.4 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 9817.9 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=FULL/3-21G*
ABC
0.03530 0.03530 0.02103

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.464
C2 0.000 0.000 1.997
Br3 0.000 1.836 -0.208
Br4 1.590 -0.918 -0.208
Br5 -1.590 -0.918 -0.208
H6 0.000 -1.033 2.354
H7 0.895 0.517 2.354
H8 -0.895 0.517 2.354

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.53311.95541.95541.95542.15382.15382.1538
C21.53312.86972.86972.86971.09301.09301.0930
Br31.95542.86973.18043.18043.84673.01763.0176
Br41.95542.86973.18043.18043.01763.01763.8467
Br51.95542.86973.18043.18043.01763.84673.0176
H62.15381.09303.84673.01763.01761.78951.7895
H72.15381.09303.01763.01763.84671.78951.7895
H82.15381.09303.01763.84673.01761.78951.7895

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 109.048 C1 C2 H7 109.048
C1 C2 H8 109.048 C2 C1 Br3 110.107
C2 C1 Br4 110.107 C2 C1 Br5 110.107
Br3 C1 Br4 108.828 Br3 C1 Br5 108.828
Br4 C1 Br5 108.828 H6 C2 H7 109.891
H6 C2 H8 109.891 H7 C2 H8 109.891
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability