return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2ClCCl3 (1,1,1,2-tetrachloroethane)

using model chemistry: HF/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/3-21G*
 hartrees
Energy at 0K-1906.048600
Energy at 298.15K 
HF Energy-1906.048600
Nuclear repulsion energy531.325491
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/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 A' 3296 2975 3.48 75.22 0.10 0.18
2 A' 1630 1471 10.99 12.33 0.75 0.86
3 A' 1470 1327 7.88 3.89 0.67 0.80
4 A' 1094 988 8.78 4.63 0.42 0.59
5 A' 878 793 46.07 38.48 0.56 0.72
6 A' 785 708 109.68 2.51 0.09 0.17
7 A' 580 524 20.38 14.10 0.11 0.20
8 A' 405 366 1.56 14.31 0.18 0.30
9 A' 329 297 0.89 5.80 0.73 0.84
10 A' 261 236 0.09 3.66 0.65 0.79
11 A' 168 152 0.76 0.69 0.69 0.81
12 A" 3365 3037 1.77 55.81 0.75 0.86
13 A" 1395 1259 10.13 8.53 0.75 0.86
14 A" 1072 968 49.39 2.44 0.75 0.86
15 A" 779 703 82.21 15.08 0.75 0.86
16 A" 362 326 0.90 2.86 0.75 0.86
17 A" 267 241 1.30 2.36 0.75 0.86
18 A" 118 106 1.83 1.32 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9127.3 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 8238.3 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/3-21G*
ABC
0.06172 0.03619 0.03419

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.267 0.286 0.000
C2 -1.266 0.368 0.000
Cl3 -2.055 -1.234 0.000
Cl4 0.865 1.978 0.000
Cl5 0.865 -0.540 1.457
Cl6 0.865 -0.540 -1.457
H7 -1.584 0.893 0.884
H8 -1.584 0.893 -0.884

Atom - Atom Distances (Å)
  C1 C2 Cl3 Cl4 Cl5 Cl6 H7 H8
C11.53482.77551.79421.77891.77892.13862.1386
C21.53481.78582.67092.73652.73651.07621.0762
Cl32.77551.78584.34113.33673.33672.35152.3515
Cl41.79422.67094.34112.90902.90902.82022.8202
Cl51.77892.73653.33672.90902.91492.89463.6784
Cl61.77892.73653.33672.90902.91493.67842.8946
H72.13861.07622.35152.82022.89463.67841.7674
H82.13861.07622.35152.82023.67842.89461.7674

picture of 1,1,1,2-tetrachloroethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Cl3 113.190 C1 C2 H7 108.708
C1 C2 H8 108.708 C2 C1 Cl4 106.439
C2 C1 Cl5 111.127 C2 C1 Cl6 111.127
Cl3 C2 H7 107.917 Cl3 C2 H8 107.917
Cl4 C1 Cl5 109.004 Cl4 C1 Cl6 109.004
Cl5 C1 Cl6 110.033 H7 C2 H8 110.398
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.397      
2 C -0.470      
3 Cl -0.011      
4 Cl 0.071      
5 Cl 0.093      
6 Cl 0.093      
7 H 0.310      
8 H 0.310      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.960 1.510 0.000 1.789
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.880 -3.394 0.000
y -3.394 -64.197 0.000
z 0.000 0.000 -63.333
Traceless
 xyz
x -1.115 -3.394 0.000
y -3.394 -0.090 0.000
z 0.000 0.000 1.205
Polar
3z2-r22.411
x2-y2-0.683
xy-3.394
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.223 1.193 0.000
y 1.193 9.436 0.000
z 0.000 0.000 7.964


<r2> (average value of r2) Å2
<r2> 344.063
(<r2>)1/2 18.549