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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: QCISD(TQ)/6-31+G**

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 QCISD(TQ)/6-31+G**
 hartrees
Energy at 0K-185.193883
Energy at 298.15K-185.192819
HF Energy-184.586337
Nuclear repulsion energy75.637288
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 QCISD(TQ)/6-31+G**
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 2369 2369        
2 Σg 861 861        
3 Σu 2180 2180        
4 Πg 424 424        
4 Πg 424 424        
5 Πu 221 221        
5 Πu 221 221        

Unscaled Zero Point Vibrational Energy (zpe) 3349.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3349.4 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 QCISD(TQ)/6-31+G**
B
0.15311

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)/6-31+G**

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.698
C2 0.000 0.000 -0.698
N3 0.000 0.000 1.874
N4 0.000 0.000 -1.874

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.39641.17632.5727
C21.39642.57271.1763
N31.17632.57273.7489
N42.57271.17633.7489

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