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All results from a given calculation for HNCCNH (Ethenediimine)

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-185.714842
Energy at 298.15K 
HF Energy-185.714842
Nuclear repulsion energy89.423031
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 mPW1PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3245 3082 0.00 959.16 0.31 0.48
2 Ag 2346 2228 0.00 3.45 0.45 0.62
3 Ag 1168 1110 0.00 36.31 0.74 0.85
4 Ag 951 903 0.00 30.20 0.31 0.47
5 Ag 457 434 0.00 4.45 0.67 0.80
6 Au 994 944 160.69 0.00 0.00 0.00
7 Au 308 292 0.13 0.00 0.00 0.00
8 Bg 873 829 0.00 3.45 0.75 0.86
9 Bu 3245 3081 13.25 0.00 0.00 0.00
10 Bu 1789 1699 110.17 0.00 0.00 0.00
11 Bu 1151 1093 491.48 0.00 0.00 0.00
12 Bu 317 301 42.30 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 8422.1 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 7997.6 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 mPW1PW91/3-21G*
ABC
10.73635 0.14020 0.13839

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.008 -0.638 0.000
C2 -0.008 0.638 0.000
N3 -0.008 -1.882 0.000
N4 0.008 1.882 0.000
H5 0.920 -2.351 0.000
H6 -0.920 2.351 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.27521.24462.51961.94173.1297
C21.27522.51961.24463.12971.9417
N31.24462.51963.76421.03994.3307
N42.51961.24463.76424.33071.0399
H51.94173.12971.03994.33075.0501
H63.12971.94174.33071.03995.0501

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 178.597 C1 N3 H5 116.118
C2 C1 N3 178.597 C2 N4 H6 116.118
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.435      
2 C 0.435      
3 N -0.734      
4 N -0.734      
5 H 0.299      
6 H 0.299      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.603 -8.688 0.000
y -8.688 -22.607 0.000
z 0.000 0.000 -22.414
Traceless
 xyz
x 0.908 -8.688 0.000
y -8.688 -0.599 0.000
z 0.000 0.000 -0.309
Polar
3z2-r2-0.617
x2-y21.004
xy-8.688
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.253 -1.097 0.000
y -1.097 10.126 0.000
z 0.000 0.000 1.531


<r2> (average value of r2) Å2
<r2> 81.093
(<r2>)1/2 9.005