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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: HF/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/6-31G*
 hartrees
Energy at 0K-223.643921
Energy at 298.15K-223.645833
HF Energy-223.643921
Nuclear repulsion energy125.783415
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 HF/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3255 2924 0.14      
2 A1 2639 2371 2.04      
3 A1 1597 1435 10.36      
4 A1 971 872 10.24      
5 A1 636 571 1.76      
6 A1 164 148 13.55      
7 A2 1366 1228 0.00      
8 A2 420 378 0.00      
9 B1 3303 2968 1.27      
10 B1 1048 942 0.32      
11 B1 383 344 1.64      
12 B2 2638 2370 6.02      
13 B2 1492 1341 7.86      
14 B2 1054 947 19.47      
15 B2 419 376 1.88      

Unscaled Zero Point Vibrational Energy (zpe) 10692.7 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 9607.4 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 HF/6-31G*
ABC
0.70391 0.09901 0.08821

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.840
C2 0.000 1.222 0.020
C3 0.000 -1.222 0.020
H4 0.876 0.000 1.476
H5 -0.876 0.000 1.476
N6 0.000 2.178 -0.588
N7 0.000 -2.178 -0.588

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.47151.47151.08291.08292.60432.6043
C21.47152.44342.09332.09331.13303.4538
C31.47152.44342.09332.09333.45381.1330
H41.08292.09332.09331.75273.12593.1259
H51.08292.09332.09331.75273.12593.1259
N62.60431.13303.45383.12593.12594.3567
N72.60433.45381.13303.12593.12594.3567

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.520 C1 C3 N7 178.520
C2 C1 C3 112.245 C2 C1 H4 109.116
C2 C1 H5 109.116 C3 C1 H4 109.116
C3 C1 H5 109.116 H4 C1 H5 108.042
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.380      
2 C 0.322      
3 C 0.322      
4 H 0.286      
5 H 0.286      
6 N -0.418      
7 N -0.418      


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 3.999 3.999
CHELPG 0.000 0.000 4.070 4.070
AIM 0.000 0.000 -2.861 2.861
ESP 0.008 0.000 4.119 4.119


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.704 0.000 0.000
y 0.000 -42.945 -0.004
z 0.000 -0.004 -26.812
Traceless
 xyz
x 8.174 0.000 0.000
y 0.000 -16.187 -0.004
z 0.000 -0.004 8.013
Polar
3z2-r216.026
x2-y216.241
xy0.000
xz0.000
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.208 0.000 0.000
y 0.000 6.708 0.003
z 0.000 0.003 4.375


<r2> (average value of r2) Å2
<r2> 119.389
(<r2>)1/2 10.927