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

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-7763.643019
Energy at 298.15K-7763.654763
HF Energy-7763.643019
Nuclear repulsion energy979.979938
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 B3PW91/3-21G*
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 3078 2953 1.46      
2 A1 1464 1405 19.71      
3 A1 1049 1006 7.16      
4 A1 419 402 5.08      
5 A1 215 206 0.10      
6 A2 314 301 0.00      
7 E 3165 3037 1.75      
7 E 3165 3037 1.75      
8 E 1534 1472 5.53      
8 E 1534 1472 5.53      
9 E 1138 1092 54.72      
9 E 1138 1092 54.73      
10 E 659 632 80.27      
10 E 659 632 80.29      
11 E 277 265 1.21      
11 E 277 265 1.22      
12 E 148 142 0.05      
12 E 148 142 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 10190.4 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 9776.6 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 B3PW91/3-21G*
ABC
0.03561 0.03561 0.02118

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.457
C2 0.000 0.000 1.978
Br3 0.000 1.830 -0.206
Br4 1.585 -0.915 -0.206
Br5 -1.585 -0.915 -0.206
H6 0.000 -1.032 2.342
H7 0.893 0.516 2.342
H8 -0.893 0.516 2.342

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.52091.94631.94631.94632.14872.14872.1487
C21.52092.84932.84932.84931.09401.09401.0940
Br31.94632.84933.16933.16933.83153.00283.0028
Br41.94632.84933.16933.16933.00283.00283.8315
Br51.94632.84933.16933.16933.00283.83153.0028
H62.14871.09403.83153.00283.00281.78691.7869
H72.14871.09403.00283.00283.83151.78691.7869
H82.14871.09403.00283.83153.00281.78691.7869

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 109.430 C1 C2 H7 109.430
C1 C2 H8 109.430 C2 C1 Br3 109.922
C2 C1 Br4 109.922 C2 C1 Br5 109.922
Br3 C1 Br4 109.017 Br3 C1 Br5 109.017
Br4 C1 Br5 109.017 H6 C2 H7 109.512
H6 C2 H8 109.512 H7 C2 H8 109.512
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.276      
2 C -0.601      
3 Br 0.037      
4 Br 0.037      
5 Br 0.037      
6 H 0.255      
7 H 0.255      
8 H 0.255      


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 1.558 1.558
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -65.608 0.000 0.000
y 0.000 -65.608 0.000
z 0.000 0.000 -63.264
Traceless
 xyz
x -1.172 0.000 0.000
y 0.000 -1.172 0.000
z 0.000 0.000 2.345
Polar
3z2-r24.690
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 10.578 0.000 0.000
y 0.000 10.578 0.000
z 0.000 0.000 7.858


<r2> (average value of r2) Å2
<r2> 440.877
(<r2>)1/2 20.997