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

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
 hartrees
Energy at 0K-7791.389879
Energy at 298.15K-7791.401461
HF Energy-7791.389879
Nuclear repulsion energy956.818700
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
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 3009 2968 1.88      
2 A1 1426 1406 18.30      
3 A1 1079 1064 20.99      
4 A1 394 388 10.17      
5 A1 208 205 0.07      
6 A2 313 309 0.00      
7 E 3107 3064 2.65      
7 E 3107 3064 2.65      
8 E 1473 1453 5.42      
8 E 1473 1453 5.42      
9 E 1096 1080 69.34      
9 E 1096 1080 69.35      
10 E 580 572 130.61      
10 E 580 572 130.63      
11 E 275 271 2.49      
11 E 275 271 2.49      
12 E 141 139 0.04      
12 E 141 139 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 9884.5 cm-1
Scaled (by 0.9862) Zero Point Vibrational Energy (zpe) 9748.1 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
ABC
0.03396 0.03396 0.02008

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.477
C2 0.000 0.000 1.987
Br3 0.000 1.879 -0.208
Br4 1.628 -0.940 -0.208
Br5 -1.628 -0.940 -0.208
H6 0.000 -1.036 2.362
H7 0.897 0.518 2.362
H8 -0.897 0.518 2.362

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.50952.00052.00052.00052.15082.15082.1508
C21.50952.88962.88962.88961.10161.10161.1016
Br32.00052.88963.25523.25523.88653.04403.0440
Br42.00052.88963.25523.25523.04403.04403.8865
Br52.00052.88963.25523.25523.04403.88653.0440
H62.15081.10163.88653.04403.04401.79361.7936
H72.15081.10163.04403.04403.88651.79361.7936
H82.15081.10163.04403.88653.04401.79361.7936

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 109.938 C1 C2 H7 109.938
C1 C2 H8 109.938 C2 C1 Br3 110.036
C2 C1 Br4 110.036 C2 C1 Br5 110.036
Br3 C1 Br4 108.901 Br3 C1 Br5 108.901
Br4 C1 Br5 108.901 H6 C2 H7 109.001
H6 C2 H8 109.001 H7 C2 H8 109.001
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.714      
2 C -0.365      
3 Br 0.153      
4 Br 0.153      
5 Br 0.153      
6 H 0.206      
7 H 0.206      
8 H 0.206      


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 1.964 1.964
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -67.715 0.000 0.000
y 0.000 -67.715 0.000
z 0.000 0.000 -63.916
Traceless
 xyz
x -1.900 0.000 0.000
y 0.000 -1.900 0.000
z 0.000 0.000 3.799
Polar
3z2-r27.598
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 10.421 0.000 0.000
y 0.000 10.421 0.000
z 0.000 0.000 6.718


<r2> (average value of r2) Å2
<r2> 461.944
(<r2>)1/2 21.493