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: B97D3/6-31G*

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 B97D3/6-31G*
 hartrees
Energy at 0K-185.533783
Energy at 298.15K-185.532975
HF Energy-185.533783
Nuclear repulsion energy 
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 B97D3/6-31G*
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 2343 2297 0.00      
2 Σg 874 857 0.00      
3 Σu 2188 2145 0.14      
4 Πg 549 538 0.00      
4 Πg 549 538 0.00      
5 Πu 244 239 17.96      
5 Πu 244 239 17.96      

Unscaled Zero Point Vibrational Energy (zpe) 3495.1 cm-1
Scaled (by 0.9804) Zero Point Vibrational Energy (zpe) 3426.6 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 B97D3/6-31G*
B
0.15496

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-31G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.690
C2 0.000 0.000 -0.690
N3 0.000 0.000 1.865
N4 0.000 0.000 -1.865

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.37931.17502.5543
C21.37932.55431.1750
N31.17502.55433.7293
N42.55431.17503.7293

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 B97D3/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.421      
2 C 0.421      
3 N -0.421      
4 N -0.421      


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 -20.455 0.000 0.000
y 0.000 -20.455 0.000
z 0.000 0.000 -29.130
Traceless
 xyz
x 4.338 0.000 0.000
y 0.000 4.338 0.000
z 0.000 0.000 -8.675
Polar
3z2-r2-17.351
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 2.039 0.000 0.000
y 0.000 2.039 0.000
z 0.000 0.000 7.922


<r2> (average value of r2) Å2
<r2> 68.965
(<r2>)1/2 8.305