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: mPW1PW91/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 mPW1PW91/STO-3G
 hartrees
Energy at 0K-146.786455
Energy at 298.15K-146.788707
HF Energy-146.786455
Nuclear repulsion energy58.108916
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 mPW1PW91/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 3584 3150 0.30      
2 A 1248 1097 1.25      
3 A 1080 949 0.87      
4 A 877 771 57.27      
5 A 480 422 0.84      
6 B 3595 3160 38.78      
7 B 2274 1998 144.75      
8 B 1039 913 349.18      
9 B 481 423 40.72      

Unscaled Zero Point Vibrational Energy (zpe) 7329.0 cm-1
Scaled (by 0.8789) Zero Point Vibrational Energy (zpe) 6441.5 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 mPW1PW91/STO-3G
ABC
9.60473 0.32829 0.32782

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/STO-3G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.066
N2 0.000 1.257 -0.105
N3 0.000 -1.257 -0.105
H4 0.690 1.747 0.537
H5 -0.690 -1.747 0.537

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.26841.26841.93651.9365
N21.26842.51361.06233.1481
N31.26842.51363.14811.0623
H41.93651.06233.14813.7565
H51.93653.14811.06233.7565

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 112.075 C1 N3 H5 112.075
N2 C1 N3 164.528
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.203      
2 N -0.307      
3 N -0.307      
4 H 0.205      
5 H 0.205      


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 2.111 2.111
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.008 3.703 0.000
y 3.703 -16.172 0.000
z 0.000 0.000 -15.652
Traceless
 xyz
x 0.904 3.703 0.000
y 3.703 -0.842 0.000
z 0.000 0.000 -0.062
Polar
3z2-r2-0.124
x2-y21.164
xy3.703
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.897 0.653 0.000
y 0.653 4.352 0.000
z 0.000 0.000 0.805


<r2> (average value of r2) Å2
<r2> 39.677
(<r2>)1/2 6.299