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

using model chemistry: mPW1PW91/6-31G(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 mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-7794.102000
Energy at 298.15K-7794.113811
HF Energy-7794.102000
Nuclear repulsion energy992.201790
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 mPW1PW91/6-31G(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 3076 2936 2.48      
2 A1 1408 1344 9.06      
3 A1 1081 1032 5.64      
4 A1 429 409 4.48      
5 A1 229 219 0.08      
6 A2 312 298 0.00      
7 E 3174 3030 2.10      
7 E 3174 3030 2.10      
8 E 1473 1406 3.56      
8 E 1473 1406 3.56      
9 E 1089 1040 43.91      
9 E 1089 1040 43.87      
10 E 658 628 72.30      
10 E 657 628 72.23      
11 E 283 270 1.33      
11 E 283 270 1.33      
12 E 156 149 0.04      
12 E 156 149 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 10099.6 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 9642.1 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 mPW1PW91/6-31G(2df,p)
ABC
0.03650 0.03650 0.02173

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.446
C2 0.000 0.000 1.959
Br3 0.000 1.806 -0.204
Br4 1.564 -0.903 -0.204
Br5 -1.564 -0.903 -0.204
H6 0.000 -1.028 2.324
H7 0.891 0.514 2.324
H8 -0.891 0.514 2.324

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51281.91961.91961.91962.14142.14142.1414
C21.51282.81752.81752.81751.09141.09141.0914
Br31.91962.81753.12883.12883.79812.97532.9753
Br41.91962.81753.12883.12882.97532.97533.7981
Br51.91962.81753.12883.12882.97533.79812.9753
H62.14141.09143.79812.97532.97531.78121.7812
H72.14141.09142.97532.97533.79811.78121.7812
H82.14141.09142.97533.79812.97531.78121.7812

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 109.565 C1 C2 H7 109.565
C1 C2 H8 109.565 C2 C1 Br3 109.775
C2 C1 Br4 109.775 C2 C1 Br5 109.775
Br3 C1 Br4 109.165 Br3 C1 Br5 109.165
Br4 C1 Br5 109.165 H6 C2 H7 109.377
H6 C2 H8 109.377 H7 C2 H8 109.377
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.415      
2 C -0.415      
3 Br 0.093      
4 Br 0.093      
5 Br 0.093      
6 H 0.184      
7 H 0.184      
8 H 0.184      


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 1.576 1.576
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -66.313 0.000 0.000
y 0.000 -66.313 0.000
z 0.000 0.000 -63.310
Traceless
 xyz
x -1.501 0.000 0.000
y 0.000 -1.501 0.000
z 0.000 0.000 3.002
Polar
3z2-r26.005
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 12.582 0.000 0.000
y 0.000 12.583 0.000
z 0.000 0.000 10.116


<r2> (average value of r2) Å2
<r2> 431.353
(<r2>)1/2 20.769