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

using model chemistry: MP2/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/6-31G
 hartrees
Energy at 0K-7787.014143
Energy at 298.15K-7787.025865
HF Energy-7786.711553
Nuclear repulsion energy955.668876
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 MP2/6-31G
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 3084 2951 4.49      
2 A1 1511 1445 10.01      
3 A1 1106 1058 6.89      
4 A1 395 378 6.18      
5 A1 212 203 0.05      
6 A2 324 310 0.00      
7 E 3182 3044 4.17      
7 E 3182 3044 4.17      
8 E 1550 1483 5.58      
8 E 1550 1483 5.58      
9 E 1165 1115 47.65      
9 E 1165 1115 47.65      
10 E 627 600 67.57      
10 E 627 600 67.57      
11 E 281 269 0.85      
11 E 281 269 0.85      
12 E 147 140 0.08      
12 E 147 140 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 10267.3 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 9823.7 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 MP2/6-31G
ABC
0.03387 0.03387 0.02003

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.472
C2 0.000 0.000 1.992
Br3 0.000 1.882 -0.208
Br4 1.630 -0.941 -0.208
Br5 -1.630 -0.941 -0.208
H6 0.000 -1.031 2.366
H7 0.893 0.515 2.366
H8 -0.893 0.515 2.366

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.52012.00112.00112.00112.15632.15632.1563
C21.52012.89552.89552.89551.09641.09641.0964
Br32.00112.89553.25943.25943.88733.04833.0483
Br42.00112.89553.25943.25943.04833.04833.8873
Br52.00112.89553.25943.25943.04833.88733.0483
H62.15631.09643.88733.04833.04831.78521.7852
H72.15631.09643.04833.04833.88731.78521.7852
H82.15631.09643.04833.88733.04831.78521.7852

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 109.944 C1 C2 H7 109.944
C1 C2 H8 109.944 C2 C1 Br3 109.881
C2 C1 Br4 109.881 C2 C1 Br5 109.881
Br3 C1 Br4 109.058 Br3 C1 Br5 109.058
Br4 C1 Br5 109.058 H6 C2 H7 108.994
H6 C2 H8 108.994 H7 C2 H8 108.994
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability