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

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-7788.478305
Energy at 298.15K-7788.490209
HF Energy-7787.680000
Nuclear repulsion energy992.492454
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 MP2/6-31G(2df,p)
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 3105 2933 0.87      
2 A1 1420 1341 8.38      
3 A1 1089 1028 3.19      
4 A1 433 409 3.34      
5 A1 233 220 0.07      
6 A2 328 310 0.00      
7 E 3215 3037 0.71      
7 E 3215 3037 0.71      
8 E 1497 1414 3.79      
8 E 1497 1414 3.79      
9 E 1101 1040 38.12      
9 E 1101 1040 38.12      
10 E 692 654 52.11      
10 E 692 654 52.11      
11 E 288 272 0.75      
11 E 288 272 0.75      
12 E 161 152 0.05      
12 E 161 152 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 10256.9 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 9687.7 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 MP2/6-31G(2df,p)
ABC
0.03652 0.03652 0.02174

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.441
C2 0.000 0.000 1.959
Br3 0.000 1.806 -0.203
Br4 1.564 -0.903 -0.203
Br5 -1.564 -0.903 -0.203
H6 0.000 -1.029 2.321
H7 0.891 0.514 2.321
H8 -0.891 0.514 2.321

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51841.91761.91761.91762.14322.14322.1432
C21.51842.81782.81782.81781.09071.09071.0907
Br31.91762.81783.12813.12813.79612.97252.9725
Br41.91762.81783.12813.12812.97252.97253.7961
Br51.91762.81783.12813.12812.97253.79612.9725
H62.14321.09073.79612.97252.97251.78221.7822
H72.14321.09072.97252.97253.79611.78221.7822
H82.14321.09072.97253.79612.97251.78221.7822

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 109.365 C1 C2 H7 109.365
C1 C2 H8 109.365 C2 C1 Br3 109.641
C2 C1 Br4 109.641 C2 C1 Br5 109.641
Br3 C1 Br4 109.301 Br3 C1 Br5 109.301
Br4 C1 Br5 109.301 H6 C2 H7 109.577
H6 C2 H8 109.577 H7 C2 H8 109.577
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability