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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: PBEPBEultrafine/6-31G*

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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-185.444607
Energy at 298.15K-185.443807
HF Energy-185.444607
Nuclear repulsion energy75.877849
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 PBEPBEultrafine/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σg 2341 2303 0.00      
2 Σg 877 863 0.00      
3 Σu 2180 2144 0.27      
4 Πg 553 544 0.00      
4 Πg 553 544 0.00      
5 Πu 244 240 16.98      
5 Πu 244 240 16.98      

Unscaled Zero Point Vibrational Energy (zpe) 3496.7 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 3439.0 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 PBEPBEultrafine/6-31G*
B
0.15456

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-31G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.689
C2 0.000 0.000 -0.689
N3 0.000 0.000 1.867
N4 0.000 0.000 -1.867

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.37861.17812.5567
C21.37862.55671.1781
N31.17812.55673.7348
N42.55671.17813.7348

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 PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.419      
2 C 0.419      
3 N -0.419      
4 N -0.419      


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 -20.522 0.000 0.000
y 0.000 -20.522 0.000
z 0.000 0.000 -29.013
Traceless
 xyz
x 4.245 0.000 0.000
y 0.000 4.245 0.000
z 0.000 0.000 -8.490
Polar
3z2-r2-16.981
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 2.037 0.000 0.000
y 0.000 2.037 0.000
z 0.000 0.000 7.915


<r2> (average value of r2) Å2
<r2> 69.109
(<r2>)1/2 8.313