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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: B3PW91/TZVP

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/TZVP
 hartrees
Energy at 0K-148.777981
Energy at 298.15K-148.780351
HF Energy-148.777981
Nuclear repulsion energy60.330391
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/TZVP
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 3626 3497 27.61      
2 A 1305 1258 0.05      
3 A 862 832 10.89      
4 A 713 688 118.79      
5 A 540 521 0.49      
6 B 3624 3495 153.36      
7 B 2259 2178 675.14      
8 B 865 834 442.30      
9 B 542 522 93.77      

Unscaled Zero Point Vibrational Energy (zpe) 7167.8 cm-1
Scaled (by 0.9643) Zero Point Vibrational Energy (zpe) 6911.9 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/TZVP
ABC
12.99843 0.34854 0.34846

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.017
N2 0.000 1.214 -0.078
N3 0.000 -1.214 -0.078
H4 0.613 1.777 0.494
H5 -0.613 -1.777 0.494

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.21741.21741.93931.9393
N21.21742.42741.00993.1060
N31.21742.42743.10601.0099
H41.93931.00993.10603.7593
H51.93933.10601.00993.7593

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 120.788 C1 N3 H5 120.788
N2 C1 N3 171.046
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.252      
2 N -0.366      
3 N -0.366      
4 H 0.240      
5 H 0.240      


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 2.223 2.223
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.829 4.483 0.000
y 4.483 -16.253 0.000
z 0.000 0.000 -17.404
Traceless
 xyz
x -0.001 4.483 0.000
y 4.483 0.864 0.000
z 0.000 0.000 -0.863
Polar
3z2-r2-1.726
x2-y2-0.577
xy4.483
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.242 0.247 0.000
y 0.247 6.491 0.000
z 0.000 0.000 2.217


<r2> (average value of r2) Å2
<r2> 38.776
(<r2>)1/2 6.227