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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: B3PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3PW91/STO-3G
 hartrees
Energy at 0K-146.767325
Energy at 298.15K-146.769563
HF Energy-146.767325
Nuclear repulsion energy57.958512
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 B3PW91/STO-3G
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 3547 3139 0.16      
2 A 1235 1093 1.34      
3 A 1073 950 0.81      
4 A 867 767 56.40      
5 A 476 421 0.64      
6 B 3559 3150 32.88      
7 B 2248 1990 133.11      
8 B 1031 912 341.98      
9 B 477 422 39.71      

Unscaled Zero Point Vibrational Energy (zpe) 7256.4 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 6421.9 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 B3PW91/STO-3G
ABC
9.51435 0.32678 0.32624

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.070
N2 0.000 1.260 -0.107
N3 0.000 -1.260 -0.107
H4 0.691 1.753 0.536
H5 -0.691 -1.753 0.536

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.27181.27181.94121.9412
N21.27182.51901.06493.1571
N31.27182.51903.15711.0649
H41.94121.06493.15713.7692
H51.94123.15711.06493.7692

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 112.046 C1 N3 H5 112.046
N2 C1 N3 164.024
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.197      
2 N -0.303      
3 N -0.303      
4 H 0.204      
5 H 0.204      


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 2.090 2.090
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.018 3.692 0.000
y 3.692 -16.068 0.000
z 0.000 0.000 -15.668
Traceless
 xyz
x 0.850 3.692 0.000
y 3.692 -0.725 0.000
z 0.000 0.000 -0.125
Polar
3z2-r2-0.250
x2-y21.050
xy3.692
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.903 0.657 0.000
y 0.657 4.375 0.000
z 0.000 0.000 0.813


<r2> (average value of r2) Å2
<r2> 39.809
(<r2>)1/2 6.309