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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: PBEPBE/3-21G

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 PBEPBE/3-21G
 hartrees
Energy at 0K-184.426125
Energy at 298.15K-184.425745
HF Energy-184.426125
Nuclear repulsion energy75.968703
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 PBEPBE/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 Σg 2340 2318 0.00      
2 Σg 878 870 0.00      
3 Σu 2150 2131 1.21      
4 Πg 788 781 0.00      
4 Πg 788 781 0.00      
5 Πu 313 310 9.43      
5 Πu 313 310 9.43      

Unscaled Zero Point Vibrational Energy (zpe) 3785.1 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 3750.7 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 PBEPBE/3-21G
B
0.15532

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.682
C2 0.000 0.000 -0.682
N3 0.000 0.000 1.864
N4 0.000 0.000 -1.864

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.36501.18202.5470
C21.36502.54701.1820
N31.18202.54703.7290
N42.54701.18203.7290

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 PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.427      
2 C 0.427      
3 N -0.427      
4 N -0.427      


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 -20.673 0.000 0.000
y 0.000 -20.673 0.000
z 0.000 0.000 -29.270
Traceless
 xyz
x 4.298 0.000 0.000
y 0.000 4.298 0.000
z 0.000 0.000 -8.596
Polar
3z2-r2-17.193
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 1.654 0.000 0.000
y 0.000 1.654 0.000
z 0.000 0.000 7.144


<r2> (average value of r2) Å2
<r2> 68.960
(<r2>)1/2 8.304