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: PBEPBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-148.624256
Energy at 298.15K-148.626625
HF Energy-148.624256
Nuclear repulsion energy59.649673
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 PBEPBE/6-31G(2df,p)
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 3520 3484 20.74      
2 A 1253 1240 0.01      
3 A 905 896 8.30      
4 A 714 707 84.58      
5 A 527 522 0.17      
6 B 3520 3484 85.86      
7 B 2202 2180 440.50      
8 B 899 890 386.36      
9 B 537 531 64.94      

Unscaled Zero Point Vibrational Energy (zpe) 7039.0 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 6966.5 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 PBEPBE/6-31G(2df,p)
ABC
12.12086 0.34136 0.34135

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.026
N2 0.000 1.228 -0.083
N3 0.000 -1.228 -0.083
H4 0.630 1.771 0.507
H5 -0.630 -1.771 0.507

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23321.23321.94081.9408
N21.23322.45671.01993.1216
N31.23322.45673.12161.0199
H41.94081.01993.12163.7602
H51.94083.12161.01993.7602

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 118.635 C1 N3 H5 118.635
N2 C1 N3 169.865
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.469      
2 N -0.510      
3 N -0.510      
4 H 0.275      
5 H 0.275      


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 1.916 1.916
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.435 3.907 0.000
y 3.907 -15.641 0.000
z 0.000 0.000 -16.955
Traceless
 xyz
x -0.138 3.907 0.000
y 3.907 1.054 0.000
z 0.000 0.000 -0.917
Polar
3z2-r2-1.834
x2-y2-0.795
xy3.907
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.237 0.420 0.000
y 0.420 6.062 0.000
z 0.000 0.000 2.196


<r2> (average value of r2) Å2
<r2> 39.017
(<r2>)1/2 6.246