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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: CCSD/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCSD/TZVP
 hartrees
Energy at 0K-148.434160
Energy at 298.15K-148.436561
HF Energy-147.947825
Nuclear repulsion energy60.148000
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 CCSD/TZVP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3626 3461 20.34      
2 A 1282 1223 0.00      
3 A 920 878 2.11      
4 A 795 759 103.88      
5 A 524 500 0.00      
6 B 3626 3461 107.26      
7 B 2223 2121 669.12      
8 B 911 869 459.72      
9 B 522 498 88.59      

Unscaled Zero Point Vibrational Energy (zpe) 7213.7 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 6884.7 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 CCSD/TZVP
ABC
11.83525 0.34750 0.34746

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.015
N2 0.000 1.220 -0.081
N3 0.000 -1.220 -0.081
H4 0.638 1.723 0.521
H5 -0.638 -1.723 0.521

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.22421.22421.90611.9061
N21.22422.44081.01133.0718
N31.22422.44083.07181.0113
H41.90611.01133.07183.6753
H51.90613.07181.01133.6753

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 116.688 C1 N3 H5 116.688
N2 C1 N3 170.993
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability