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

using model chemistry: PBEPBE/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at PBEPBE/3-21G*
 hartrees
Energy at 0K-7762.379209
Energy at 298.15K-7762.390816
HF Energy-7762.379209
Nuclear repulsion energy973.387389
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 PBEPBE/3-21G*
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 3003 2864 1.52      
2 A1 1416 1350 18.79      
3 A1 1022 975 10.37      
4 A1 406 387 5.49      
5 A1 208 198 0.09      
6 A2 302 288 0.00      
7 E 3090 2946 2.30      
7 E 3090 2946 2.30      
8 E 1491 1422 4.64      
8 E 1491 1422 4.64      
9 E 1100 1049 55.88      
9 E 1100 1049 55.89      
10 E 621 592 94.57      
10 E 621 592 94.59      
11 E 269 256 1.41      
11 E 269 256 1.41      
12 E 142 135 0.03      
12 E 142 135 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 9890.1 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 9430.2 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 PBEPBE/3-21G*
ABC
0.03513 0.03513 0.02088

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.461
C2 0.000 0.000 1.987
Br3 0.000 1.843 -0.207
Br4 1.596 -0.921 -0.207
Br5 -1.596 -0.921 -0.207
H6 0.000 -1.040 2.352
H7 0.900 0.520 2.352
H8 -0.900 0.520 2.352

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.52651.96001.96001.96002.15862.15862.1586
C21.52652.86532.86532.86531.10201.10201.1020
Br31.96002.86533.19183.19183.85473.01833.0183
Br41.96002.86533.19183.19183.01833.01833.8547
Br51.96002.86533.19183.19183.01833.85473.0183
H62.15861.10203.85473.01833.01831.80091.8009
H72.15861.10203.01833.01833.85471.80091.8009
H82.15861.10203.01833.85473.01831.80091.8009

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 109.348 C1 C2 H7 109.348
C1 C2 H8 109.348 C2 C1 Br3 109.913
C2 C1 Br4 109.913 C2 C1 Br5 109.913
Br3 C1 Br4 109.025 Br3 C1 Br5 109.025
Br4 C1 Br5 109.025 H6 C2 H7 109.594
H6 C2 H8 109.594 H7 C2 H8 109.594
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.276      
2 C -0.581      
3 Br 0.040      
4 Br 0.040      
5 Br 0.040      
6 H 0.246      
7 H 0.246      
8 H 0.246      


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 1.513 1.513
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -65.567 0.000 0.000
y 0.000 -65.567 0.000
z 0.000 0.000 -63.334
Traceless
 xyz
x -1.116 0.000 0.000
y 0.000 -1.116 0.000
z 0.000 0.000 2.233
Polar
3z2-r24.465
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 10.918 0.000 0.000
y 0.000 10.918 0.000
z 0.000 0.000 8.092


<r2> (average value of r2) Å2
<r2> 446.354
(<r2>)1/2 21.127