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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: PBEPBE/3-21G

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/3-21G
 hartrees
Energy at 0K-147.779619
Energy at 298.15K-147.781909
HF Energy-147.779619
Nuclear repulsion energy59.374725
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/3-21G
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 3457 3425 12.86      
2 A 1257 1245 0.23      
3 A 806 799 10.50      
4 A 657 651 138.64      
5 A 527 522 0.86      
6 B 3460 3428 93.99      
7 B 2243 2222 322.34      
8 B 809 802 524.61      
9 B 539 534 63.77      

Unscaled Zero Point Vibrational Energy (zpe) 6876.7 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 6814.1 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 PBEPBE/3-21G
ABC
14.18976 0.33643 0.33615

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.029
N2 0.000 1.230 -0.077
N3 0.000 -1.230 -0.077
H4 0.597 1.874 0.453
H5 -0.597 -1.874 0.453

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23441.23442.01182.0118
N21.23442.45951.02633.2047
N31.23442.45953.20471.0263
H42.01181.02633.20473.9332
H52.01183.20471.02633.9332

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 125.479 C1 N3 H5 125.479
N2 C1 N3 170.085
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.714      
2 N -0.668      
3 N -0.668      
4 H 0.311      
5 H 0.311      


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 2.191 2.191
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.508 4.527 0.000
y 4.527 -14.380 0.000
z 0.000 0.000 -17.175
Traceless
 xyz
x -0.730 4.527 0.000
y 4.527 2.461 0.000
z 0.000 0.000 -1.731
Polar
3z2-r2-3.462
x2-y2-2.128
xy4.527
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.343 0.410 0.000
y 0.410 5.702 0.000
z 0.000 0.000 1.290


<r2> (average value of r2) Å2
<r2> 39.414
(<r2>)1/2 6.278