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 CH2ClI (chloroiodomethane)

using model chemistry: HF/STO-3G

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/STO-3G
 hartrees
Energy at 0K-7343.831474
Energy at 298.15K 
HF Energy-7343.831474
Nuclear repulsion energy287.683679
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/STO-3G
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' 3608 2946 1.58 43.10 0.17 0.29
2 A' 1752 1430 0.97 17.82 0.70 0.82
3 A' 1478 1207 91.01 0.48 0.71 0.83
4 A' 950 775 70.62 13.38 0.60 0.75
5 A' 686 560 15.20 21.28 0.21 0.35
6 A' 231 188 1.74 5.15 0.57 0.72
7 A" 3740 3053 0.91 36.79 0.75 0.86
8 A" 1360 1110 0.31 14.98 0.75 0.86
9 A" 934 763 0.13 2.60 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7368.0 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 6015.9 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/STO-3G
ABC
0.93217 0.05259 0.05025

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.792 -1.039 0.000
Cl2 -0.445 -2.366 0.000
I3 0.000 0.921 0.000
H4 1.409 -1.186 0.886
H5 1.409 -1.186 -0.886

Atom - Atom Distances (Å)
  C1 Cl2 I3 H4 H5
C11.81412.11451.08981.0898
Cl21.81413.31702.36982.3698
I32.11453.31702.68562.6856
H41.08982.36982.68561.7722
H51.08982.36982.68561.7722

picture of chloroiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 I3 114.985 Cl2 C1 H4 106.720
Cl2 C1 H5 106.720 I3 C1 H4 109.704
I3 C1 H5 109.704 H4 C1 H5 108.803
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.163      
2 Cl -0.155      
3 I 0.092      
4 H 0.113      
5 H 0.113      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.986 0.550 0.000 2.061
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.141 -2.975 0.000
y -2.975 -49.038 0.000
z 0.000 0.000 -44.047
Traceless
 xyz
x 3.401 -2.975 0.000
y -2.975 -5.444 0.000
z 0.000 0.000 2.043
Polar
3z2-r24.085
x2-y25.897
xy-2.975
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.879 -0.065 0.000
y -0.065 5.037 0.000
z 0.000 0.000 0.998


<r2> (average value of r2) Å2
<r2> 190.457
(<r2>)1/2 13.801