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 C2N2 (Cyanogen)

using model chemistry: HSEh1PBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at HSEh1PBE/6-311G*
 hartrees
Energy at 0K-185.496932
Energy at 298.15K-185.496224
HF Energy-185.496932
Nuclear repulsion energy77.020318
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 HSEh1PBE/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 2473 2374 0.00      
2 Σg 897 861 0.00      
3 Σu 2292 2199 0.00      
4 Πg 578 554 0.00      
4 Πg 578 554 0.00      
5 Πu 260 250 19.56      
5 Πu 260 250 19.56      

Unscaled Zero Point Vibrational Energy (zpe) 3669.3 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 3521.1 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 HSEh1PBE/6-311G*
B
0.15870

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-311G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.687
C2 0.000 0.000 -0.687
N3 0.000 0.000 1.841
N4 0.000 0.000 -1.841

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.37411.15372.5278
C21.37412.52781.1537
N31.15372.52783.6815
N42.52781.15373.6815

picture of Cyanogen state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 180.000 C2 C1 N3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.203      
2 C 0.203      
3 N -0.203      
4 N -0.203      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.788 0.000 0.000
y 0.000 -20.788 0.000
z 0.000 0.000 -29.700
Traceless
 xyz
x 4.456 0.000 0.000
y 0.000 4.456 0.000
z 0.000 0.000 -8.912
Polar
3z2-r2-17.824
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 2.186 0.000 0.000
y 0.000 2.186 0.000
z 0.000 0.000 7.595


<r2> (average value of r2) Å2
<r2> 67.941
(<r2>)1/2 8.243