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: PBE1PBE/cc-pVTZ

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 PBE1PBE/cc-pVTZ
 hartrees
Energy at 0K-185.496429
Energy at 298.15K-185.495686
HF Energy-185.496429
Nuclear repulsion energy77.084918
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 PBE1PBE/cc-pVTZ
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 2468 2371 0.00      
2 Σg 892 857 0.00      
3 Σu 2292 2202 0.04      
4 Πg 557 535 0.00      
4 Πg 557 535 0.00      
5 Πu 254 244 21.04      
5 Πu 254 244 21.04      

Unscaled Zero Point Vibrational Energy (zpe) 3636.7 cm-1
Scaled (by 0.961) Zero Point Vibrational Energy (zpe) 3494.9 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 PBE1PBE/cc-pVTZ
B
0.15887

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/cc-pVTZ

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.688
C2 0.000 0.000 -0.688
N3 0.000 0.000 1.839
N4 0.000 0.000 -1.839

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.37551.15162.5272
C21.37552.52721.1516
N31.15162.52723.6788
N42.52721.15163.6788

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 PBE1PBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.018      
2 C 0.018      
3 N -0.018      
4 N -0.018      


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 -20.828 0.000 0.000
y 0.000 -20.828 0.000
z 0.000 0.000 -29.712
Traceless
 xyz
x 4.442 0.000 0.000
y 0.000 4.442 0.000
z 0.000 0.000 -8.885
Polar
3z2-r2-17.770
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 2.660 0.000 0.000
y 0.000 2.660 0.000
z 0.000 0.000 7.785


<r2> (average value of r2) Å2
<r2> 67.902
(<r2>)1/2 8.240