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

using model chemistry: CISD/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 CISD/3-21G
 hartrees
Energy at 0K-7757.495143
Energy at 298.15K-7757.507008
HF Energy-7757.198800
Nuclear repulsion energy956.022213
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 CISD/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 3122 2939 4.13      
2 A1 1528 1438 10.01      
3 A1 1065 1003 4.45      
4 A1 408 384 5.11      
5 A1 219 206 0.04      
6 A2 328 309 0.00      
7 E 3199 3011 3.36      
7 E 3199 3011 3.36      
8 E 1585 1492 3.83      
8 E 1585 1492 3.83      
9 E 1181 1112 51.76      
9 E 1181 1112 51.76      
10 E 685 645 61.76      
10 E 685 645 61.76      
11 E 293 275 0.62      
11 E 293 275 0.62      
12 E 153 144 0.10      
12 E 153 144 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 10429.8 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 9817.5 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 CISD/3-21G
ABC
0.03389 0.03389 0.01997

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.451
C2 0.000 0.000 1.976
Br3 0.000 1.885 -0.206
Br4 1.632 -0.942 -0.206
Br5 -1.632 -0.942 -0.206
H6 0.000 -1.028 2.344
H7 0.890 0.514 2.344
H8 -0.890 0.514 2.344

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.52571.99571.99571.99572.15442.15442.1544
C21.52572.88332.88332.88331.09141.09141.0914
Br31.99572.88333.26423.26423.87083.02883.0288
Br41.99572.88333.26423.26423.02883.02883.8708
Br51.99572.88333.26423.26423.02883.87083.0288
H62.15441.09143.87083.02883.02881.77981.7798
H72.15441.09143.02883.02883.87081.77981.7798
H82.15441.09143.02883.87083.02881.77981.7798

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 109.696 C1 C2 H7 109.696
C1 C2 H8 109.696 C2 C1 Br3 109.205
C2 C1 Br4 109.205 C2 C1 Br5 109.205
Br3 C1 Br4 109.736 Br3 C1 Br5 109.736
Br4 C1 Br5 109.736 H6 C2 H7 109.246
H6 C2 H8 109.246 H7 C2 H8 109.246
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability