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

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 C3V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-7758.434936
Energy at 298.15K-7758.446754
HF Energy-7757.847206
Nuclear repulsion energy975.082565
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 A1 3101 2950 0.98      
2 A1 1497 1424 11.16      
3 A1 1038 987 4.25      
4 A1 422 402 5.41      
5 A1 219 208 0.15      
6 A2 325 309 0.00      
7 E 3191 3036 1.51      
7 E 3191 3036 1.51      
8 E 1576 1499 4.78      
8 E 1576 1499 4.78      
9 E 1171 1114 45.26      
9 E 1171 1114 45.26      
10 E 680 647 66.20      
10 E 680 647 66.19      
11 E 280 267 0.86      
11 E 280 267 0.86      
12 E 152 144 0.09      
12 E 152 144 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 10351.3 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 9847.2 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
0.03524 0.03524 0.02099

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

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 1.998
Br3 0.000 1.838 -0.208
Br4 1.592 -0.919 -0.208
Br5 -1.592 -0.919 -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
C11.53381.95691.95691.95692.15442.15442.1544
C21.53382.87122.87122.87121.09321.09321.0932
Br31.95692.87123.18333.18333.84843.01873.0187
Br41.95692.87123.18333.18333.01873.01873.8484
Br51.95692.87123.18333.18333.01873.84843.0187
H62.15441.09323.84843.01873.01871.78991.7899
H72.15441.09323.01873.01873.84841.78991.7899
H82.15441.09323.01873.84843.01871.78991.7899

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 109.034 C1 C2 H7 109.034
C1 C2 H8 109.034 C2 C1 Br3 110.086
C2 C1 Br4 110.086 C2 C1 Br5 110.086
Br3 C1 Br4 108.849 Br3 C1 Br5 108.849
Br4 C1 Br5 108.849 H6 C2 H7 109.905
H6 C2 H8 109.905 H7 C2 H8 109.905
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability