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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: mPW1PW91/STO-3G

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 mPW1PW91/STO-3G
 hartrees
Energy at 0K-183.217358
Energy at 298.15K-183.216441
HF Energy-183.217358
Nuclear repulsion energy74.437190
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 mPW1PW91/STO-3G
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 2446 2150 0.00      
2 Σg 875 769 0.00      
3 Σu 2274 1999 58.75      
4 Πg 585 514 0.00      
4 Πg 585 514 0.00      
5 Πu 244 215 11.15      
5 Πu 244 215 11.15      

Unscaled Zero Point Vibrational Energy (zpe) 3627.1 cm-1
Scaled (by 0.8789) Zero Point Vibrational Energy (zpe) 3187.8 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 mPW1PW91/STO-3G
B
0.14876

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/STO-3G

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.702
C2 0.000 0.000 -0.702
N3 0.000 0.000 1.904
N4 0.000 0.000 -1.904

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.40501.20112.6060
C21.40502.60601.2011
N31.20112.60603.8071
N42.60601.20113.8071

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 mPW1PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.096      
2 C 0.096      
3 N -0.096      
4 N -0.096      


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 -19.091 0.000 0.000
y 0.000 -19.091 0.000
z 0.000 0.000 -27.262
Traceless
 xyz
x 4.085 0.000 0.000
y 0.000 4.085 0.000
z 0.000 0.000 -8.171
Polar
3z2-r2-16.341
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 0.796 0.000 0.000
y 0.000 0.796 0.000
z 0.000 0.000 5.083


<r2> (average value of r2) Å2
<r2> 70.275
(<r2>)1/2 8.383