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

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-7764.183782
Energy at 298.15K-7764.195564
HF Energy-7764.183782
Nuclear repulsion energy982.289061
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 mPW1PW91/3-21G*
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 3094 2938 1.30      
2 A1 1473 1399 20.52      
3 A1 1060 1006 6.38      
4 A1 423 402 4.96      
5 A1 217 207 0.11      
6 A2 317 301 0.00      
7 E 3184 3023 1.44      
7 E 3184 3023 1.44      
8 E 1542 1464 5.78      
8 E 1542 1464 5.78      
9 E 1146 1088 54.70      
9 E 1146 1088 54.68      
10 E 672 638 76.51      
10 E 672 638 76.48      
11 E 279 265 1.09      
11 E 279 265 1.09      
12 E 149 142 0.07      
12 E 149 142 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 10263.6 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 9746.3 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 mPW1PW91/3-21G*
ABC
0.03577 0.03577 0.02128

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.455
C2 0.000 0.000 1.974
Br3 0.000 1.825 -0.206
Br4 1.581 -0.913 -0.206
Br5 -1.581 -0.913 -0.206
H6 0.000 -1.030 2.337
H7 0.892 0.515 2.337
H8 -0.892 0.515 2.337

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51901.94121.94121.94122.14572.14572.1457
C21.51902.84292.84292.84291.09241.09241.0924
Br31.94122.84293.16183.16183.82362.99632.9963
Br41.94122.84293.16183.16182.99632.99633.8236
Br51.94122.84293.16183.16182.99633.82362.9963
H62.14571.09243.82362.99632.99631.78451.7845
H72.14571.09242.99632.99633.82361.78451.7845
H82.14571.09242.99633.82362.99631.78451.7845

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 109.421 C1 C2 H7 109.421
C1 C2 H8 109.421 C2 C1 Br3 109.889
C2 C1 Br4 109.889 C2 C1 Br5 109.889
Br3 C1 Br4 109.050 Br3 C1 Br5 109.050
Br4 C1 Br5 109.050 H6 C2 H7 109.522
H6 C2 H8 109.522 H7 C2 H8 109.522
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.285      
2 C -0.609      
3 Br 0.040      
4 Br 0.040      
5 Br 0.040      
6 H 0.258      
7 H 0.258      
8 H 0.258      


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 1.554 1.554
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -65.632 0.000 0.000
y 0.000 -65.632 0.000
z 0.000 0.000 -63.319
Traceless
 xyz
x -1.156 0.000 0.000
y 0.000 -1.156 0.000
z 0.000 0.000 2.312
Polar
3z2-r24.624
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 10.497 0.000 0.000
y 0.000 10.496 0.000
z 0.000 0.000 7.809


<r2> (average value of r2) Å2
<r2> 439.023
(<r2>)1/2 20.953