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: PBEPBEultrafine/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 PBEPBEultrafine/6-31G**
 hartrees
Energy at 0K-148.616145
Energy at 298.15K-148.618474
HF Energy-148.616145
Nuclear repulsion energy59.469988
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 PBEPBEultrafine/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 3522 3474 17.16      
2 A 1257 1240 0.02      
3 A 904 892 7.87      
4 A 714 704 95.00      
5 A 506 500 0.11      
6 B 3524 3475 71.68      
7 B 2203 2173 439.52      
8 B 902 890 401.31      
9 B 508 501 62.27      

Unscaled Zero Point Vibrational Energy (zpe) 7020.3 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 6924.1 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 PBEPBEultrafine/6-31G**
ABC
11.96367 0.33944 0.33937

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.031
N2 0.000 1.232 -0.086
N3 0.000 -1.232 -0.086
H4 0.632 1.774 0.507
H5 -0.632 -1.774 0.507

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23761.23761.94221.9422
N21.23762.46421.02163.1282
N31.23762.46423.12821.0216
H41.94221.02163.12823.7660
H51.94223.12821.02163.7660

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 118.252 C1 N3 H5 118.252
N2 C1 N3 169.213
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.585      
2 N -0.573      
3 N -0.573      
4 H 0.280      
5 H 0.280      


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 2.092 2.092
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.451 4.147 0.000
y 4.147 -15.716 0.000
z 0.000 0.000 -17.016
Traceless
 xyz
x -0.086 4.147 0.000
y 4.147 1.018 0.000
z 0.000 0.000 -0.932
Polar
3z2-r2-1.864
x2-y2-0.736
xy4.147
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.876 0.431 0.000
y 0.431 6.058 0.000
z 0.000 0.000 1.854


<r2> (average value of r2) Å2
<r2> 39.206
(<r2>)1/2 6.261