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: BLYP/TZVP

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 BLYP/TZVP
 hartrees
Energy at 0K-185.693697
Energy at 298.15K-185.692887
HF Energy-185.693697
Nuclear repulsion energy76.385766
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 BLYP/TZVP
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 2319 2313 0.00      
2 Σg 866 864 0.00      
3 Σu 2167 2162 0.12      
4 Πg 536 535 0.00      
4 Πg 536 535 0.00      
5 Πu 244 243 17.92      
5 Πu 244 243 17.92      

Unscaled Zero Point Vibrational Energy (zpe) 3455.2 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 3446.6 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 BLYP/TZVP
B
0.15645

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/TZVP

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 1.855
N4 0.000 0.000 -1.855

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.37511.16782.5429
C21.37512.54291.1678
N31.16782.54293.7107
N42.54291.16783.7107

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 BLYP/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.026      
2 C 0.026      
3 N -0.026      
4 N -0.026      


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 -21.093 0.000 0.000
y 0.000 -21.093 0.000
z 0.000 0.000 -30.433
Traceless
 xyz
x 4.670 0.000 0.000
y 0.000 4.670 0.000
z 0.000 0.000 -9.341
Polar
3z2-r2-18.682
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 2.414 0.000 0.000
y 0.000 2.414 0.000
z 0.000 0.000 8.538


<r2> (average value of r2) Å2
<r2> 68.984
(<r2>)1/2 8.306