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

using model chemistry: B3PW91/6-31G(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 B3PW91/6-31G(2df,p)
 hartrees
Energy at 0K-7793.570211
Energy at 298.15K-7793.581978
HF Energy-7793.570211
Nuclear repulsion energy989.486171
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 B3PW91/6-31G(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 3059 2941 2.61      
2 A1 1400 1346 8.67      
3 A1 1069 1028 6.29      
4 A1 423 407 4.56      
5 A1 226 218 0.07      
6 A2 309 297 0.00      
7 E 3156 3034 2.33      
7 E 3156 3034 2.33      
8 E 1465 1408 3.41      
8 E 1465 1408 3.41      
9 E 1082 1040 43.79      
9 E 1082 1040 43.77      
10 E 642 617 75.55      
10 E 642 617 75.59      
11 E 281 270 1.52      
11 E 281 270 1.52      
12 E 155 149 0.03      
12 E 155 149 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 10022.9 cm-1
Scaled (by 0.9614) Zero Point Vibrational Energy (zpe) 9636.0 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 B3PW91/6-31G(2df,p)
ABC
0.03630 0.03630 0.02161

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.448
C2 0.000 0.000 1.963
Br3 0.000 1.811 -0.204
Br4 1.569 -0.906 -0.204
Br5 -1.569 -0.906 -0.204
H6 0.000 -1.030 2.329
H7 0.892 0.515 2.329
H8 -0.892 0.515 2.329

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51481.92541.92541.92542.14472.14472.1447
C21.51482.82452.82452.82451.09291.09291.0929
Br31.92542.82453.13763.13763.80672.98272.9827
Br41.92542.82453.13763.13762.98272.98273.8067
Br51.92542.82453.13763.13762.98273.80672.9827
H62.14471.09293.80672.98272.98271.78321.7832
H72.14471.09292.98272.98273.80671.78321.7832
H82.14471.09292.98273.80672.98271.78321.7832

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 109.602 C1 C2 H7 109.602
C1 C2 H8 109.602 C2 C1 Br3 109.805
C2 C1 Br4 109.805 C2 C1 Br5 109.805
Br3 C1 Br4 109.135 Br3 C1 Br5 109.135
Br4 C1 Br5 109.135 H6 C2 H7 109.340
H6 C2 H8 109.340 H7 C2 H8 109.340
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.395      
2 C -0.413      
3 Br 0.088      
4 Br 0.088      
5 Br 0.088      
6 H 0.181      
7 H 0.181      
8 H 0.181      


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 1.586 1.586
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -66.342 0.000 0.000
y 0.000 -66.342 0.000
z 0.000 0.000 -63.276
Traceless
 xyz
x -1.533 0.000 0.000
y 0.000 -1.533 0.000
z 0.000 0.000 3.066
Polar
3z2-r26.131
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 12.695 0.000 0.000
y 0.000 12.695 -0.000
z 0.000 -0.000 10.186


<r2> (average value of r2) Å2
<r2> 433.508
(<r2>)1/2 20.821