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: HF/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at HF/TZVP
 hartrees
Energy at 0K-7794.719171
Energy at 298.15K-7794.731200
HF Energy-7794.719171
Nuclear repulsion energy978.969511
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 HF/TZVP
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 3200 2907 6.46      
2 A1 1549 1408 1.00      
3 A1 1123 1021 2.26      
4 A1 442 402 5.23      
5 A1 234 213 0.04      
6 A2 337 306 0.00      
7 E 3283 2983 5.20      
7 E 3283 2983 5.20      
8 E 1603 1457 2.90      
8 E 1603 1457 2.90      
9 E 1200 1090 55.78      
9 E 1200 1090 55.78      
10 E 716 651 84.33      
10 E 716 651 84.33      
11 E 299 272 1.41      
11 E 299 272 1.41      
12 E 163 148 0.04      
12 E 163 148 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 10707.2 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 9728.5 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 HF/TZVP
ABC
0.03553 0.03553 0.02109

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.452
C2 0.000 0.000 1.970
Br3 0.000 1.834 -0.205
Br4 1.588 -0.917 -0.205
Br5 -1.588 -0.917 -0.205
H6 0.000 -1.019 2.332
H7 0.882 0.509 2.332
H8 -0.882 0.509 2.332

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51871.94781.94781.94782.13892.13892.1389
C21.51872.84512.84512.84511.08101.08101.0810
Br31.94782.84513.17623.17623.81772.99522.9952
Br41.94782.84513.17623.17622.99522.99523.8177
Br51.94782.84513.17623.17622.99523.81772.9952
H62.13891.08103.81772.99522.99521.76411.7641
H72.13891.08102.99522.99523.81771.76411.7641
H82.13891.08102.99523.81772.99521.76411.7641

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 109.575 C1 C2 H7 109.575
C1 C2 H8 109.575 C2 C1 Br3 109.701
C2 C1 Br4 109.701 C2 C1 Br5 109.701
Br3 C1 Br4 109.240 Br3 C1 Br5 109.240
Br4 C1 Br5 109.240 H6 C2 H7 109.367
H6 C2 H8 109.367 H7 C2 H8 109.367
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.176      
2 C -0.265      
3 Br -0.085      
4 Br -0.085      
5 Br -0.085      
6 H 0.114      
7 H 0.114      
8 H 0.114      


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 1.834 1.834
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -68.256 0.000 0.000
y 0.000 -68.256 0.000
z 0.000 0.000 -64.986
Traceless
 xyz
x -1.635 0.000 0.000
y 0.000 -1.635 0.000
z 0.000 0.000 3.270
Polar
3z2-r26.540
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 11.757 0.000 0.000
y 0.000 11.757 0.000
z 0.000 0.000 8.684


<r2> (average value of r2) Å2
<r2> 443.411
(<r2>)1/2 21.057