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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: B2PLYP/6-31G(2df,p)

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 B2PLYP/6-31G(2df,p)
 hartrees
Energy at 0K-185.528869
Energy at 298.15K-185.528114
HF Energy-185.307986
Nuclear repulsion energy76.468785
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 B2PLYP/6-31G(2df,p)
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 2356 2250 0.00      
2 Σg 877 838 0.00      
3 Σu 2184 2085 2.26      
4 Πg 556 531 0.00      
4 Πg 556 531 0.00      
5 Πu 255 243 21.13      
5 Πu 255 243 21.13      

Unscaled Zero Point Vibrational Energy (zpe) 3519.1 cm-1
Scaled (by 0.955) Zero Point Vibrational Energy (zpe) 3360.7 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 B2PLYP/6-31G(2df,p)
B
0.15672

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G(2df,p)

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 1.853
N4 0.000 0.000 -1.853

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.37581.16562.5414
C21.37582.54141.1656
N31.16562.54143.7070
N42.54141.16563.7070

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 B2PLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.232      
2 C 0.232      
3 N -0.232      
4 N -0.232      


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 -20.540 0.000 0.000
y 0.000 -20.540 0.000
z 0.000 0.000 -29.639
Traceless
 xyz
x 4.549 0.000 0.000
y 0.000 4.549 0.000
z 0.000 0.000 -9.098
Polar
3z2-r2-18.197
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 2.400 0.000 0.000
y 0.000 2.400 0.000
z 0.000 0.000 7.415


<r2> (average value of r2) Å2
<r2> 68.497
(<r2>)1/2 8.276