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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: HF/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 HF/CEP-31G*
 hartrees
Energy at 0K-30.277214
Energy at 298.15K-30.276560
HF Energy-30.277214
Nuclear repulsion energy36.154445
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/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 2748 2468 0.00      
2 Σg 924 830 0.00      
3 Σu 2539 2280 13.37      
4 Πg 595 534 0.00      
4 Πg 595 534 0.00      
5 Πu 275 247 21.24      
5 Πu 275 247 21.24      

Unscaled Zero Point Vibrational Energy (zpe) 3975.2 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 3569.8 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/CEP-31G*
B
0.15453

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.711
C2 0.000 0.000 -0.711
N3 0.000 0.000 1.861
N4 0.000 0.000 -1.861

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.42251.14932.5718
C21.42252.57181.1493
N31.14932.57183.7212
N42.57181.14933.7212

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 HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.424      
2 C -0.424      
3 N 0.424      
4 N 0.424      


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 -21.049 0.000 0.000
y 0.000 -21.049 0.000
z 0.000 0.000 -30.640
Traceless
 xyz
x 4.796 0.000 0.000
y 0.000 4.796 0.000
z 0.000 0.000 -9.591
Polar
3z2-r2-19.183
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 2.240 0.000 0.000
y 0.000 2.240 0.000
z 0.000 0.000 7.209


<r2> (average value of r2) Å2
<r2> 53.808
(<r2>)1/2 7.335