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 ICN (Cyanogen iodide)

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 C*V 1Σ
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-6982.929344
Energy at 298.15K-6982.927140
HF Energy-6982.929344
Nuclear repulsion energy163.341841
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 Σ 2273 2184 5.46      
2 Σ 499 479 0.58      
3 Π 404 389 0.53      
3 Π 404 389 0.53      

Unscaled Zero Point Vibrational Energy (zpe) 1790.0 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 1720.6 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
B
0.10448

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
I1 0.000 0.000 0.524
C2 0.000 0.000 -1.505
N3 0.000 0.000 -2.674

Atom - Atom Distances (Å)
  I1 C2 N3
I12.02903.1979
C22.02901.1688
N33.19791.1688

picture of Cyanogen iodide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I1 C2 N3 180.000
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 I 0.497      
2 C -0.112      
3 N -0.385      


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 3.239 3.239
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.863 0.000 0.000
y 0.000 -38.863 0.000
z 0.000 0.000 -45.227
Traceless
 xyz
x 3.182 0.000 0.000
y 0.000 3.182 0.000
z 0.000 0.000 -6.363
Polar
3z2-r2-12.727
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 2.129 0.000 0.000
y 0.000 2.129 0.000
z 0.000 0.000 7.773


<r2> (average value of r2) Å2
<r2> 103.789
(<r2>)1/2 10.188