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: B2PLYP=FULL/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 B2PLYP=FULL/cc-pVTZ
 hartrees
Energy at 0K-148.740396
Energy at 298.15K-148.742804
HF Energy-148.543780
Nuclear repulsion energy60.207586
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 B2PLYP=FULL/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 3620 3460 25.76      
2 A 1274 1217 0.00      
3 A 927 886 11.34      
4 A 725 693 92.10      
5 A 541 517 0.28      
6 B 3619 3459 136.04      
7 B 2224 2125 577.98      
8 B 920 880 453.04      
9 B 543 519 79.05      

Unscaled Zero Point Vibrational Energy (zpe) 7196.1 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 6878.0 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 B2PLYP=FULL/cc-pVTZ
ABC
12.56515 0.34734 0.34730

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.019
N2 0.000 1.218 -0.080
N3 0.000 -1.218 -0.080
H4 0.618 1.759 0.505
H5 -0.618 -1.759 0.505

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.22171.22171.92691.9269
N21.22172.43531.00863.0961
N31.22172.43533.09611.0086
H41.92691.00863.09613.7293
H51.92693.09611.00863.7293

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 119.222 C1 N3 H5 119.222
N2 C1 N3 170.707
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability