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/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-148.623350
Energy at 298.15K-148.625699
HF Energy-148.623350
Nuclear repulsion energy59.361309
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/cc-pVDZ
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 3468 3448 19.48      
2 A 1248 1240 0.00      
3 A 925 919 5.52      
4 A 720 716 79.50      
5 A 505 502 0.42      
6 B 3470 3449 66.92      
7 B 2191 2178 433.56      
8 B 921 915 355.56      
9 B 510 507 57.64      

Unscaled Zero Point Vibrational Energy (zpe) 6978.3 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 6937.9 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/cc-pVDZ
ABC
11.45705 0.33902 0.33892

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.029
N2 0.000 1.234 -0.087
N3 0.000 -1.234 -0.087
H4 0.644 1.757 0.521
H5 -0.644 -1.757 0.521

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23971.23971.93491.9349
N21.23972.46851.02843.1197
N31.23972.46853.11971.0284
H41.93491.02843.11973.7430
H51.93493.11971.02843.7430

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 116.794 C1 N3 H5 116.794
N2 C1 N3 169.237
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.104      
2 N -0.184      
3 N -0.184      
4 H 0.132      
5 H 0.132      


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 1.969 1.969
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.408 3.876 0.000
y 3.876 -15.804 0.000
z 0.000 0.000 -16.942
Traceless
 xyz
x -0.035 3.876 0.000
y 3.876 0.871 0.000
z 0.000 0.000 -0.835
Polar
3z2-r2-1.671
x2-y2-0.604
xy3.876
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.001 0.446 0.000
y 0.446 5.959 0.000
z 0.000 0.000 1.970


<r2> (average value of r2) Å2
<r2> 39.220
(<r2>)1/2 6.263