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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: TPSSh/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at TPSSh/6-31G*
 hartrees
Energy at 0K-148.781602
Energy at 298.15K-148.783985
HF Energy-148.781602
Nuclear repulsion energy59.738566
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 TPSSh/6-31G*
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 3555 3411 16.84      
2 A 1277 1225 0.03      
3 A 953 914 7.74      
4 A 754 723 104.21      
5 A 522 501 0.01      
6 B 3556 3411 66.16      
7 B 2228 2138 496.28      
8 B 945 907 452.79      
9 B 522 501 66.96      

Unscaled Zero Point Vibrational Energy (zpe) 7156.0 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 6865.4 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 TPSSh/6-31G*
ABC
12.06805 0.34245 0.34244

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.028
N2 0.000 1.226 -0.083
N3 0.000 -1.226 -0.083
H4 0.629 1.773 0.498
H5 -0.629 -1.773 0.498

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23071.23071.93881.9388
N21.23072.45151.01583.1182
N31.23072.45153.11821.0158
H41.93881.01583.11823.7617
H51.93883.11821.01583.7617

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 119.006 C1 N3 H5 119.006
N2 C1 N3 169.698
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.617      
2 N -0.660      
3 N -0.660      
4 H 0.352      
5 H 0.352      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 2.200 2.200
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.834 0.413 0.000
y 0.413 5.973 0.000
z 0.000 0.000 1.808


<r2> (average value of r2) Å2
<r2> 38.991
(<r2>)1/2 6.244