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

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-7757.543328
Energy at 298.15K-7757.555020
HF Energy-7757.197161
Nuclear repulsion energy946.493094
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 MP4/3-21G
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 3048 2956        
2 A1 1489 1444        
3 A1 1029 998        
4 A1 385 374        
5 A1 207 201        
6 A2 315 305        
7 E 3129 3035        
7 E 3129 3034        
8 E 1553 1507        
8 E 1553 1506        
9 E 1148 1113        
9 E 1147 1113        
10 E 637 618        
10 E 637 618        
11 E 281 273        
11 E 280 272        
12 E 145 141        
12 E 145 141        

Unscaled Zero Point Vibrational Energy (zpe) 10128.8 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 9822.9 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 MP4/3-21G
ABC
0.03322 0.03322 0.01956

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.458
C2 0.000 0.000 1.991
Br3 0.000 1.904 -0.207
Br4 1.649 -0.952 -0.207
Br5 -1.649 -0.952 -0.207
H6 0.000 -1.034 2.359
H7 0.895 0.517 2.359
H8 -0.895 0.517 2.359

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.53282.01742.01742.01742.16372.16372.1637
C21.53282.90872.90872.90871.09751.09751.0975
Br32.01742.90873.29853.29853.90143.05183.0518
Br42.01742.90873.29853.29853.05183.05183.9014
Br52.01742.90873.29853.29853.05183.90143.0518
H62.16371.09753.90143.05183.05181.79081.7908
H72.16371.09753.05183.05183.90141.79081.7908
H82.16371.09753.05183.90143.05181.79081.7908

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 109.589 C1 C2 H7 109.589
C1 C2 H8 109.589 C2 C1 Br3 109.269
C2 C1 Br4 109.269 C2 C1 Br5 109.269
Br3 C1 Br4 109.672 Br3 C1 Br5 109.672
Br4 C1 Br5 109.672 H6 C2 H7 109.353
H6 C2 H8 109.353 H7 C2 H8 109.353
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability