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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: TPSSh/aug-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 TPSSh/aug-cc-pVTZ
 hartrees
Energy at 0K-185.726487
Energy at 298.15K-185.725722
HF Energy-185.726487
Nuclear repulsion energy76.859625
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 TPSSh/aug-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 2397 2314 0.00      
2 Σg 880 849 0.00      
3 Σu 2235 2157 0.05      
4 Πg 551 532 0.00      
4 Πg 551 532 0.00      
5 Πu 250 241 20.27      
5 Πu 250 241 20.27      

Unscaled Zero Point Vibrational Energy (zpe) 3557.2 cm-1
Scaled (by 0.9652) Zero Point Vibrational Energy (zpe) 3433.4 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 TPSSh/aug-cc-pVTZ
B
0.15815

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.687
C2 0.000 0.000 -0.687
N3 0.000 0.000 1.844
N4 0.000 0.000 -1.844

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.37391.15752.5313
C21.37392.53131.1575
N31.15752.53133.6888
N42.53131.15753.6888

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 TPSSh/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.453      
2 C 0.453      
3 N -0.453      
4 N -0.453      


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


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.256 0.000 0.000
y 0.000 3.256 0.000
z 0.000 0.000 8.429


<r2> (average value of r2) Å2
<r2> 68.219
(<r2>)1/2 8.259