return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: PBEPBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-7799.126417
Energy at 298.15K-7799.137988
HF Energy-7799.126417
Nuclear repulsion energy966.278720
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 PBEPBE/6-311G*
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 2990 2959 3.06      
2 A1 1374 1360 12.20      
3 A1 1037 1026 12.87      
4 A1 398 394 5.99      
5 A1 209 206 0.00      
6 A2 322 319 0.00      
7 E 3075 3043 3.89      
7 E 3075 3043 3.89      
8 E 1441 1426 3.39      
8 E 1441 1426 3.39      
9 E 1059 1048 59.12      
9 E 1059 1048 59.13      
10 E 573 567 117.72      
10 E 573 567 117.74      
11 E 271 268 3.65      
11 E 271 268 3.65      
12 E 143 142 0.02      
12 E 143 142 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 9726.8 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 9625.6 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 PBEPBE/6-311G*
ABC
0.03463 0.03463 0.02050

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.461
C2 0.000 0.000 1.976
Br3 0.000 1.860 -0.206
Br4 1.611 -0.930 -0.206
Br5 -1.611 -0.930 -0.206
H6 0.000 -1.034 2.349
H7 0.895 0.517 2.349
H8 -0.895 0.517 2.349

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51551.97611.97611.97612.15302.15302.1530
C21.51552.86772.86772.86771.09911.09911.0991
Br31.97612.86773.22183.22183.86083.02273.0227
Br41.97612.86773.22183.22183.02273.02273.8608
Br51.97612.86773.22183.22183.02273.86083.0227
H62.15301.09913.86083.02273.02271.79071.7907
H72.15301.09913.02273.02273.86081.79071.7907
H82.15301.09913.02273.86083.02271.79071.7907

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 109.840 C1 C2 H7 109.840
C1 C2 H8 109.840 C2 C1 Br3 109.728
C2 C1 Br4 109.728 C2 C1 Br5 109.728
Br3 C1 Br4 109.213 Br3 C1 Br5 109.213
Br4 C1 Br5 109.213 H6 C2 H7 109.099
H6 C2 H8 109.099 H7 C2 H8 109.099
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.431      
2 C -0.589      
3 Br 0.081      
4 Br 0.081      
5 Br 0.081      
6 H 0.259      
7 H 0.259      
8 H 0.259      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.679 1.679
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -67.421 0.000 0.000
y 0.000 -67.421 0.000
z 0.000 0.000 -64.601
Traceless
 xyz
x -1.410 0.000 0.000
y 0.000 -1.410 0.000
z 0.000 0.000 2.820
Polar
3z2-r25.640
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 12.125 0.000 0.000
y 0.000 12.125 0.000
z 0.000 0.000 9.110


<r2> (average value of r2) Å2
<r2> 453.764
(<r2>)1/2 21.302