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

using model chemistry: LSDA/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 LSDA/6-31G*
 hartrees
Energy at 0K-7784.310199
Energy at 298.15K-7784.321862
HF Energy-7784.310199
Nuclear repulsion energy987.425633
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 LSDA/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 3004 2947 0.31      
2 A1 1366 1341 25.19      
3 A1 1097 1077 10.03      
4 A1 418 410 6.67      
5 A1 220 216 0.10      
6 A2 310 304 0.00      
7 E 3099 3041 0.42      
7 E 3099 3041 0.42      
8 E 1428 1402 5.60      
8 E 1428 1402 5.60      
9 E 1051 1032 55.54      
9 E 1051 1032 55.52      
10 E 610 599 95.86      
10 E 610 599 95.82      
11 E 277 271 2.03      
11 E 277 271 2.03      
12 E 152 150 0.02      
12 E 152 150 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 9825.3 cm-1
Scaled (by 0.9813) Zero Point Vibrational Energy (zpe) 9641.6 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 LSDA/6-31G*
ABC
0.03617 0.03617 0.02150

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.459
C2 0.000 0.000 1.953
Br3 0.000 1.816 -0.204
Br4 1.573 -0.908 -0.204
Br5 -1.573 -0.908 -0.204
H6 0.000 -1.038 2.326
H7 0.899 0.519 2.326
H8 -0.899 0.519 2.326

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.49451.93341.93341.93342.13602.13602.1360
C21.49452.82032.82032.82031.10261.10261.1026
Br31.93342.82033.14573.14573.81402.98202.9820
Br41.93342.82033.14573.14572.98202.98203.8140
Br51.93342.82033.14573.14572.98203.81402.9820
H62.13601.10263.81402.98202.98201.79761.7976
H72.13601.10262.98202.98203.81401.79761.7976
H82.13601.10262.98203.81402.98201.79761.7976

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 109.739 C1 C2 H7 109.739
C1 C2 H8 109.739 C2 C1 Br3 110.060
C2 C1 Br4 110.060 C2 C1 Br5 110.060
Br3 C1 Br4 108.876 Br3 C1 Br5 108.876
Br4 C1 Br5 108.876 H6 C2 H7 109.203
H6 C2 H8 109.203 H7 C2 H8 109.202
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.077      
2 C -0.524      
3 Br -0.021      
4 Br -0.021      
5 Br -0.021      
6 H 0.221      
7 H 0.221      
8 H 0.221      


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 1.631 1.631
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -66.114 0.000 0.000
y 0.000 -66.114 0.000
z 0.000 0.000 -63.359
Traceless
 xyz
x -1.378 0.000 0.000
y 0.000 -1.378 0.000
z 0.000 0.000 2.756
Polar
3z2-r25.511
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 11.515 0.000 0.000
y 0.000 11.515 0.000
z 0.000 0.000 8.890


<r2> (average value of r2) Å2
<r2> 435.051
(<r2>)1/2 20.858