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: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-7787.787242
Energy at 298.15K-7787.799060
HF Energy-7787.133437
Nuclear repulsion energy973.671620
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 QCISD/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3089 2942 3.11      
2 A1 1465 1395 7.68      
3 A1 1104 1052 3.63      
4 A1 421 401 5.05      
5 A1 225 214 0.07      
6 A2 325 310 0.00      
7 E 3181 3029 2.77      
7 E 3181 3029 2.77      
8 E 1529 1456 4.22      
8 E 1529 1456 4.22      
9 E 1128 1074 42.60      
9 E 1128 1074 42.60      
10 E 655 624 67.04      
10 E 655 624 67.04      
11 E 286 272 1.28      
11 E 286 272 1.28      
12 E 159 152 0.04      
12 E 159 152 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 10252.9 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 9763.9 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 QCISD/6-31G*
ABC
0.03515 0.03515 0.02089

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.466
C2 0.000 0.000 1.984
Br3 0.000 1.842 -0.207
Br4 1.596 -0.921 -0.207
Br5 -1.596 -0.921 -0.207
H6 0.000 -1.032 2.349
H7 0.894 0.516 2.349
H8 -0.894 0.516 2.349

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51871.96141.96141.96142.14772.14772.1477
C21.51872.86302.86302.86301.09471.09471.0947
Br31.96142.86303.19133.19133.84673.01543.0154
Br41.96142.86303.19133.19133.01543.01543.8467
Br51.96142.86303.19133.19133.01543.84673.0154
H62.14771.09473.84673.01543.01541.78761.7876
H72.14771.09473.01543.01543.84671.78761.7876
H82.14771.09473.01543.84673.01541.78761.7876

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 109.466 C1 C2 H7 109.466
C1 C2 H8 109.466 C2 C1 Br3 110.057
C2 C1 Br4 110.057 C2 C1 Br5 110.057
Br3 C1 Br4 108.879 Br3 C1 Br5 108.879
Br4 C1 Br5 108.879 H6 C2 H7 109.476
H6 C2 H8 109.476 H7 C2 H8 109.476
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability