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

using model chemistry: HF/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 HF/6-31G
 hartrees
Energy at 0K-7786.713064
Energy at 298.15K-7786.725041
HF Energy-7786.713064
Nuclear repulsion energy969.077851
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/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 3226 2912 6.22      
2 A1 1605 1449 9.58      
3 A1 1154 1042 3.05      
4 A1 429 388 8.51      
5 A1 231 208 0.09      
6 A2 337 305 0.00      
7 E 3316 2994 2.79      
7 E 3316 2994 2.79      
8 E 1637 1478 5.99      
8 E 1637 1478 5.99      
9 E 1240 1120 66.53      
9 E 1240 1120 66.53      
10 E 691 624 92.70      
10 E 691 624 92.70      
11 E 302 272 1.01      
11 E 302 272 1.01      
12 E 159 144 0.19      
12 E 159 144 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 10836.3 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 9784.1 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 HF/6-31G
ABC
0.03482 0.03482 0.02063

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.465
C2 0.000 0.000 1.975
Br3 0.000 1.854 -0.206
Br4 1.606 -0.927 -0.206
Br5 -1.606 -0.927 -0.206
H6 0.000 -1.015 2.345
H7 0.879 0.508 2.345
H8 -0.879 0.508 2.345

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51001.97231.97231.97232.13652.13652.1365
C21.51002.86332.86332.86331.08061.08061.0806
Br31.97232.86333.21173.21173.84003.01623.0162
Br41.97232.86333.21173.21173.01623.01623.8400
Br51.97232.86333.21173.21173.01623.84003.0162
H62.13651.08063.84003.01623.01621.75871.7587
H72.13651.08063.01623.01623.84001.75871.7587
H82.13651.08063.01623.84003.01621.75871.7587

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 110.012 C1 C2 H7 110.012
C1 C2 H8 110.012 C2 C1 Br3 109.916
C2 C1 Br4 109.916 C2 C1 Br5 109.916
Br3 C1 Br4 109.022 Br3 C1 Br5 109.022
Br4 C1 Br5 109.022 H6 C2 H7 108.925
H6 C2 H8 108.925 H7 C2 H8 108.925
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.763      
2 C -0.368      
3 Br 0.166      
4 Br 0.166      
5 Br 0.166      
6 H 0.211      
7 H 0.211      
8 H 0.211      


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 2.131 2.131
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -69.331 0.000 0.000
y 0.000 -69.331 0.000
z 0.000 0.000 -64.959
Traceless
 xyz
x -2.186 0.000 0.000
y 0.000 -2.186 0.000
z 0.000 0.000 4.372
Polar
3z2-r28.744
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 9.842 0.000 0.000
y 0.000 9.842 0.000
z 0.000 0.000 5.953


<r2> (average value of r2) Å2
<r2> 452.206
(<r2>)1/2 21.265