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: CCD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCD/cc-pVDZ
 hartrees
Energy at 0K-148.369958
Energy at 298.15K-148.372387
HF Energy-147.911230
Nuclear repulsion energy59.595938
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 CCD/cc-pVDZ
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 3595 3440 20.89      
2 A 1277 1222 0.01      
3 A 997 954 3.34      
4 A 824 789 82.71      
5 A 513 490 0.04      
6 B 3596 3440 76.87      
7 B 2232 2135 541.85      
8 B 990 947 393.38      
9 B 516 494 69.96      

Unscaled Zero Point Vibrational Energy (zpe) 7270.5 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 6955.7 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 CCD/cc-pVDZ
ABC
11.01672 0.34196 0.34195

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.010
N2 0.000 1.233 -0.082
N3 0.000 -1.233 -0.082
H4 0.658 1.700 0.546
H5 -0.658 -1.700 0.546

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23681.23681.90041.9004
N21.23682.46661.02283.0716
N31.23682.46663.07161.0228
H41.90041.02283.07163.6465
H51.90043.07161.02283.6465

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 114.173 C1 N3 H5 114.173
N2 C1 N3 171.420
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability