return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: CCSD/daug-cc-pVTZ

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/daug-cc-pVTZ
 hartrees
Energy at 0K-148.527681
Energy at 298.15K-148.530117
HF Energy-147.960548
Nuclear repulsion energy60.162805
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/daug-cc-pVTZ
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 3625 3625 24.21      
2 A 1279 1279 0.01      
3 A 963 963 8.22      
4 A 771 771 85.22      
5 A 544 544 0.05      
6 B 3623 3623 139.61      
7 B 2208 2208 724.29      
8 B 956 956 457.94      
9 B 546 546 78.05      

Unscaled Zero Point Vibrational Energy (zpe) 7257.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7257.2 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/daug-cc-pVTZ
ABC
12.00598 0.34738 0.34737

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/daug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.014
N2 0.000 1.220 -0.080
N3 0.000 -1.220 -0.080
H4 0.632 1.730 0.520
H5 -0.632 -1.730 0.520

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.22371.22371.91041.9104
N21.22372.44011.01003.0765
N31.22372.44013.07651.0100
H41.91041.01003.07653.6842
H51.91043.07651.01003.6842

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.259 C1 N3 H5 117.259
N2 C1 N3 171.177
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability