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

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-7758.472861
Energy at 298.15K-7758.484652
HF Energy-7757.846807
Nuclear repulsion energy972.629219
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/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 3052 2933 2.52      
2 A1 1485 1427 10.29      
3 A1 1029 989 2.92      
4 A1 418 402 4.64      
5 A1 217 209 0.15      
6 A2 317 305 0.00      
7 E 3133 3011 2.85      
7 E 3133 3011 2.85      
8 E 1557 1497 4.49      
8 E 1557 1497 4.49      
9 E 1161 1116 40.82      
9 E 1161 1116 40.82      
10 E 683 657 55.49      
10 E 683 657 55.49      
11 E 278 267 0.70      
11 E 278 267 0.70      
12 E 151 145 0.10      
12 E 151 145 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 10221.6 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 9824.0 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/3-21G*
ABC
0.03506 0.03506 0.02088

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.462
C2 0.000 0.000 2.000
Br3 0.000 1.843 -0.208
Br4 1.596 -0.921 -0.208
Br5 -1.596 -0.921 -0.208
H6 0.000 -1.036 2.360
H7 0.897 0.518 2.360
H8 -0.897 0.518 2.360

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.53861.96091.96091.96092.16252.16252.1625
C21.53862.87652.87652.87651.09671.09671.0967
Br31.96092.87653.19213.19213.85803.02583.0258
Br41.96092.87653.19213.19213.02583.02583.8580
Br51.96092.87653.19213.19213.02583.85803.0258
H62.16251.09673.85803.02583.02581.79451.7945
H72.16251.09673.02583.02583.85801.79451.7945
H82.16251.09673.02583.85803.02581.79451.7945

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 109.139 C1 C2 H7 109.139
C1 C2 H8 109.139 C2 C1 Br3 109.978
C2 C1 Br4 109.978 C2 C1 Br5 109.978
Br3 C1 Br4 108.960 Br3 C1 Br5 108.960
Br4 C1 Br5 108.960 H6 C2 H7 109.801
H6 C2 H8 109.801 H7 C2 H8 109.801
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability