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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: B3PW91/6-31G*

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 B3PW91/6-31G*
 hartrees
Energy at 0K-185.572084
Energy at 298.15K-185.571333
HF Energy-185.572084
Nuclear repulsion energy76.487448
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 B3PW91/6-31G*
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 2454 2348 0.00      
2 Σg 895 857 0.00      
3 Σu 2283 2184 0.00      
4 Πg 566 542 0.00      
4 Πg 566 542 0.00      
5 Πu 254 243 19.18      
5 Πu 254 243 19.18      

Unscaled Zero Point Vibrational Energy (zpe) 3636.4 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 3478.9 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 B3PW91/6-31G*
B
0.15665

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.690
C2 0.000 0.000 -0.690
N3 0.000 0.000 1.853
N4 0.000 0.000 -1.853

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.37951.16362.5430
C21.37952.54301.1636
N31.16362.54303.7066
N42.54301.16363.7066

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

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.434      
2 C 0.434      
3 N -0.434      
4 N -0.434      


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 0.000 0.000 0.000 0.000


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.499 0.000 0.000
y 0.000 -20.499 0.000
z 0.000 0.000 -29.313
Traceless
 xyz
x 4.407 0.000 0.000
y 0.000 4.407 0.000
z 0.000 0.000 -8.814
Polar
3z2-r2-17.628
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 2.019 0.000 0.000
y 0.000 2.019 0.000
z 0.000 0.000 7.596


<r2> (average value of r2) Å2
<r2> 68.433
(<r2>)1/2 8.272