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

using model chemistry: HF/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 HF/6-31G(2df,p)
 hartrees
Energy at 0K-7787.680150
Energy at 298.15K-7787.692235
HF Energy-7787.680150
Nuclear repulsion energy991.421902
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(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 3196 2894 5.96      
2 A1 1542 1396 2.86      
3 A1 1129 1023 1.52      
4 A1 452 410 4.81      
5 A1 244 221 0.09      
6 A2 339 307 0.00      
7 E 3284 2974 5.35      
7 E 3284 2974 5.35      
8 E 1598 1447 3.10      
8 E 1598 1447 3.10      
9 E 1193 1080 43.01      
9 E 1193 1080 43.01      
10 E 733 664 66.80      
10 E 733 664 66.80      
11 E 303 275 1.07      
11 E 303 275 1.07      
12 E 170 154 0.06      
12 E 170 154 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 10732.3 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 9718.1 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(2df,p)
ABC
0.03643 0.03643 0.02170

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.442
C2 0.000 0.000 1.964
Br3 0.000 1.808 -0.204
Br4 1.566 -0.904 -0.204
Br5 -1.566 -0.904 -0.204
H6 0.000 -1.020 2.326
H7 0.884 0.510 2.326
H8 -0.884 0.510 2.326

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.52141.92001.92001.92002.14192.14192.1419
C21.52142.82262.82262.82261.08271.08271.0827
Br31.92002.82263.13143.13143.79442.97712.9771
Br41.92002.82263.13143.13142.97712.97713.7944
Br51.92002.82263.13143.13142.97713.79442.9771
H62.14191.08273.79442.97712.97711.76741.7674
H72.14191.08272.97712.97713.79441.76741.7674
H82.14191.08272.97713.79442.97711.76741.7674

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 109.523 C1 C2 H7 109.523
C1 C2 H8 109.523 C2 C1 Br3 109.669
C2 C1 Br4 109.669 C2 C1 Br5 109.669
Br3 C1 Br4 109.272 Br3 C1 Br5 109.272
Br4 C1 Br5 109.272 H6 C2 H7 109.419
H6 C2 H8 109.419 H7 C2 H8 109.419
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.492      
2 C -0.363      
3 Br 0.105      
4 Br 0.105      
5 Br 0.105      
6 H 0.180      
7 H 0.180      
8 H 0.180      


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 1.665 1.665
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -67.579 0.000 0.000
y 0.000 -67.579 0.000
z 0.000 0.000 -64.356
Traceless
 xyz
x -1.612 0.000 0.000
y 0.000 -1.612 0.000
z 0.000 0.000 3.223
Polar
3z2-r26.446
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 12.151 0.000 0.000
y 0.000 12.151 0.000
z 0.000 0.000 9.673


<r2> (average value of r2) Å2
<r2> 432.766
(<r2>)1/2 20.803