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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: QCISD(TQ)=FULL/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 QCISD(TQ)=FULL/6-31G*
 hartrees
Energy at 0K-185.202183
Energy at 298.15K-185.201325
HF Energy-184.582817
Nuclear repulsion energy75.763604
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)=FULL/6-31G*
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 2388 2388        
2 Σg 867 867        
3 Σu 2196 2196        
4 Πg 526 526        
4 Πg 526 526        
5 Πu 238 238        
5 Πu 238 238        

Unscaled Zero Point Vibrational Energy (zpe) 3488.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3488.7 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)=FULL/6-31G*
B
0.15364

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.697
C2 0.000 0.000 -0.697
N3 0.000 0.000 1.871
N4 0.000 0.000 -1.871

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.39351.17462.5680
C21.39352.56801.1746
N31.17462.56803.7426
N42.56801.17463.7426

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