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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: HSEh1PBE/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at HSEh1PBE/3-21G*
 hartrees
Energy at 0K-147.788032
Energy at 298.15K-147.790337
HF Energy-147.788032
Nuclear repulsion energy60.062304
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 HSEh1PBE/3-21G*
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 3621 3475 21.97      
2 A 1320 1267 0.05      
3 A 776 745 18.75      
4 A 668 642 169.83      
5 A 549 527 3.48      
6 B 3620 3475 182.55      
7 B 2342 2248 437.65      
8 B 785 754 576.89      
9 B 560 538 97.58      

Unscaled Zero Point Vibrational Energy (zpe) 7120.8 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 6835.2 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 HSEh1PBE/3-21G*
ABC
15.67675 0.34320 0.34287

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.019
N2 0.000 1.216 -0.071
N3 0.000 -1.216 -0.071
H4 0.572 1.879 0.438
H5 -0.572 -1.879 0.438

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.21901.21902.00852.0085
N21.21902.43141.01313.1881
N31.21902.43143.18811.0131
H42.00851.01313.18813.9284
H52.00853.18811.01313.9284

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 128.028 C1 N3 H5 128.028
N2 C1 N3 171.553
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.789      
2 N -0.726      
3 N -0.726      
4 H 0.332      
5 H 0.332      


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 2.279 2.279
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.537 4.638 0.000
y 4.638 -14.292 0.000
z 0.000 0.000 -17.167
Traceless
 xyz
x -0.807 4.638 0.000
y 4.638 2.559 0.000
z 0.000 0.000 -1.753
Polar
3z2-r2-3.505
x2-y2-2.244
xy4.638
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.257 0.345 0.000
y 0.345 5.544 0.000
z 0.000 0.000 1.204


<r2> (average value of r2) Å2
<r2> 38.856
(<r2>)1/2 6.233