return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for CNN (Diazocarbene)

using model chemistry: MP2/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 3Σ-
Energy calculated at MP2/SDD
 hartrees
Energy at 0K-146.838051
Energy at 298.15K 
HF Energy-146.610183
Nuclear repulsion energy46.239325
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 MP2/SDD
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 2001 1932 661.67 76.97 0.37 0.54
2 Σ 895 864 43.60 7.93 0.17 0.29
3 Π 330 318 0.03 0.00 0.75 0.86
3 Π 330 318 0.03 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1777.8 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 1716.1 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 MP2/SDD
B
0.39556

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.322
N2 0.000 0.000 -0.106
N3 0.000 0.000 1.239

Atom - Atom Distances (Å)
  C1 N2 N3
C11.21592.5607
N21.21591.3449
N32.56071.3449

picture of Diazocarbene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 N3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability