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

using model chemistry: MP2/SDD

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/SDD
 hartrees
Energy at 0K-117.093758
Energy at 298.15K-117.105420
HF Energy-116.812635
Nuclear repulsion energy115.470319
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/SDD
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 3040 2934 9.13      
2 A1 1471 1420 6.56      
3 A1 1055 1018 4.68      
4 A1 388 374 4.31      
5 A1 210 203 0.01      
6 A2 322 311 0.00      
7 E 3153 3044 7.34      
7 E 3153 3044 7.34      
8 E 1507 1455 6.73      
8 E 1507 1455 6.73      
9 E 1127 1088 58.06      
9 E 1127 1088 58.06      
10 E 618 596 63.78      
10 E 618 596 63.78      
11 E 276 266 1.49      
11 E 276 266 1.49      
12 E 149 144 0.00      
12 E 149 144 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 10072.1 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 9722.6 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/SDD
ABC
0.03305 0.03305 0.01955

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.473
C2 0.000 0.000 2.021
Br3 0.000 1.905 -0.211
Br4 1.650 -0.952 -0.211
Br5 -1.650 -0.952 -0.211
H6 0.000 -1.037 2.396
H7 0.898 0.518 2.396
H8 -0.898 0.518 2.396

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.54822.02372.02372.02372.18462.18462.1846
C21.54822.93402.93402.93401.10251.10251.1025
Br32.02372.93403.29923.29923.93023.08573.0857
Br42.02372.93403.29923.29923.08573.08573.9302
Br52.02372.93403.29923.29923.08573.93023.0857
H62.18461.10253.93023.08573.08571.79591.7959
H72.18461.10253.08573.08573.93021.79591.7959
H82.18461.10253.08573.93023.08571.79591.7959

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 109.871 C1 C2 H7 109.871
C1 C2 H8 109.871 C2 C1 Br3 109.741
C2 C1 Br4 109.741 C2 C1 Br5 109.741
Br3 C1 Br4 109.200 Br3 C1 Br5 109.200
Br4 C1 Br5 109.200 H6 C2 H7 109.069
H6 C2 H8 109.069 H7 C2 H8 109.069
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability