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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-7787.134200
Energy at 298.15K-7787.146226
HF Energy-7787.134200
Nuclear repulsion energy981.888446
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 3239 2910 6.90      
2 A1 1571 1411 2.32      
3 A1 1141 1025 1.76      
4 A1 446 400 5.97      
5 A1 239 215 0.07      
6 A2 337 302 0.00      
7 E 3325 2988 4.99      
7 E 3325 2988 4.99      
8 E 1628 1463 2.77      
8 E 1628 1463 2.77      
9 E 1207 1085 49.73      
9 E 1207 1085 49.73      
10 E 713 640 83.69      
10 E 713 640 83.69      
11 E 300 270 1.35      
11 E 300 270 1.35      
12 E 170 153 0.04      
12 E 170 153 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 10828.7 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 9729.6 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
0.03574 0.03574 0.02126

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 0.456
C2 0.000 0.000 1.976
Br3 0.000 1.826 -0.206
Br4 1.582 -0.913 -0.206
Br5 -1.582 -0.913 -0.206
H6 0.000 -1.019 2.339
H7 0.882 0.510 2.339
H8 -0.882 0.510 2.339

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51981.94251.94251.94252.14082.14082.1408
C21.51982.84502.84502.84501.08171.08171.0817
Br31.94252.84503.16343.16343.81702.99772.9977
Br41.94252.84503.16343.16342.99772.99773.8170
Br51.94252.84503.16343.16342.99773.81702.9977
H62.14081.08173.81702.99772.99771.76501.7650
H72.14081.08172.99772.99773.81701.76501.7650
H82.14081.08172.99773.81702.99771.76501.7650

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 109.603 C1 C2 H7 109.603
C1 C2 H8 109.603 C2 C1 Br3 109.912
C2 C1 Br4 109.912 C2 C1 Br5 109.912
Br3 C1 Br4 109.027 Br3 C1 Br5 109.027
Br4 C1 Br5 109.027 H6 C2 H7 109.339
H6 C2 H8 109.339 H7 C2 H8 109.339
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 -0.074      
2 C -0.452      
3 Br -0.035      
4 Br -0.035      
5 Br -0.035      
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 1.754 1.754
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -67.634 0.000 0.000
y 0.000 -67.634 0.000
z 0.000 0.000 -64.523
Traceless
 xyz
x -1.555 0.000 0.000
y 0.000 -1.555 0.000
z 0.000 0.000 3.111
Polar
3z2-r26.222
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 11.053 0.000 0.000
y 0.000 11.053 0.000
z 0.000 0.000 8.273


<r2> (average value of r2) Å2
<r2> 440.468
(<r2>)1/2 20.987