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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: B3LYP/CEP-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 B3LYP/CEP-31G
 hartrees
Energy at 0K-30.968621
Energy at 298.15K-30.967822
HF Energy-30.968621
Nuclear repulsion energy35.358449
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 B3LYP/CEP-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 2362 2287 0.00      
2 Σg 873 845 0.00      
3 Σu 2155 2087 0.38      
4 Πg 550 533 0.00      
4 Πg 550 533 0.00      
5 Πu 244 237 12.53      
5 Πu 244 237 12.53      

Unscaled Zero Point Vibrational Energy (zpe) 3489.5 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 3379.3 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 B3LYP/CEP-31G
B
0.14931

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.706
C2 0.000 0.000 -0.706
N3 0.000 0.000 1.898
N4 0.000 0.000 -1.898

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.41201.19252.6045
C21.41202.60451.1925
N31.19252.60453.7969
N42.60451.19253.7969

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

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.492      
2 C -0.492      
3 N 0.492      
4 N 0.492      


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 -21.008 0.000 0.000
y 0.000 -21.008 0.000
z 0.000 0.000 -31.322
Traceless
 xyz
x 5.157 0.000 0.000
y 0.000 5.157 0.000
z 0.000 0.000 -10.314
Polar
3z2-r2-20.628
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 2.107 0.000 0.000
y 0.000 2.107 0.000
z 0.000 0.000 8.019


<r2> (average value of r2) Å2
<r2> 55.298
(<r2>)1/2 7.436