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/6-31G(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 PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-7792.318530
Energy at 298.15K-7792.330142
HF Energy-7792.318530
Nuclear repulsion energy982.729319
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/6-31G(2df,p)
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 2989 2958 2.22      
2 A1 1350 1336 8.68      
3 A1 1038 1027 8.98      
4 A1 408 404 4.90      
5 A1 218 216 0.05      
6 A2 299 296 0.00      
7 E 3084 3052 2.37      
7 E 3084 3052 2.36      
8 E 1418 1404 2.87      
8 E 1418 1404 2.87      
9 E 1044 1033 43.83      
9 E 1044 1033 43.81      
10 E 597 591 85.92      
10 E 597 591 85.96      
11 E 272 269 1.95      
11 E 272 269 1.95      
12 E 148 147 0.01      
12 E 148 147 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 9713.8 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 9613.8 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/6-31G(2df,p)
ABC
0.03581 0.03581 0.02130

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.453
C2 0.000 0.000 1.972
Br3 0.000 1.824 -0.205
Br4 1.580 -0.912 -0.205
Br5 -1.580 -0.912 -0.205
H6 0.000 -1.037 2.341
H7 0.898 0.518 2.341
H8 -0.898 0.518 2.341

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51971.93951.93951.93952.15402.15402.1540
C21.51972.84102.84102.84101.10041.10041.1004
Br31.93952.84103.15993.15993.83022.99912.9991
Br41.93952.84103.15993.15992.99912.99913.8302
Br51.93952.84103.15993.15992.99913.83022.9991
H62.15401.10043.83022.99912.99911.79601.7960
H72.15401.10042.99912.99913.83021.79601.7960
H82.15401.10042.99913.83022.99911.79601.7960

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 109.557 C1 C2 H7 109.557
C1 C2 H8 109.557 C2 C1 Br3 109.838
C2 C1 Br4 109.838 C2 C1 Br5 109.838
Br3 C1 Br4 109.102 Br3 C1 Br5 109.102
Br4 C1 Br5 109.102 H6 C2 H7 109.386
H6 C2 H8 109.386 H7 C2 H8 109.386
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.361      
2 C -0.384      
3 Br 0.082      
4 Br 0.082      
5 Br 0.082      
6 H 0.167      
7 H 0.167      
8 H 0.167      


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 1.569 1.569
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -66.453 0.000 0.000
y 0.000 -66.453 0.000
z 0.000 0.000 -63.374
Traceless
 xyz
x -1.540 0.000 0.000
y 0.000 -1.540 0.000
z 0.000 0.000 3.079
Polar
3z2-r26.158
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 13.057 0.000 0.000
y 0.000 13.057 0.000
z 0.000 0.000 10.437


<r2> (average value of r2) Å2
<r2> 439.012
(<r2>)1/2 20.953