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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-224.463622
Energy at 298.15K-224.465263
HF Energy-223.654326
Nuclear repulsion energy124.221278
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 MP2/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3121 2948 1.10      
2 A1 2221 2098 1.19      
3 A1 1469 1388 11.46      
4 A1 907 856 3.93      
5 A1 576 544 0.50      
6 A1 144 136 10.53      
7 A2 1257 1187 0.00      
8 A2 363 343 0.00      
9 B1 3176 2999 4.91      
10 B1 945 893 0.54      
11 B1 336 317 0.72      
12 B2 2225 2102 4.38      
13 B2 1349 1274 2.70      
14 B2 999 943 4.15      
15 B2 364 344 0.80      

Unscaled Zero Point Vibrational Energy (zpe) 9725.3 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 9185.5 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 MP2/6-31G(2df,p)
ABC
0.67795 0.09790 0.08693

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.850
C2 0.000 1.213 0.031
C3 0.000 -1.213 0.031
H4 0.882 0.000 1.496
H5 -0.882 0.000 1.496
N6 0.000 2.198 -0.604
N7 0.000 -2.198 -0.604

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46321.46321.09301.09302.63582.6358
C21.46322.42502.09622.09621.17273.4695
C31.46322.42502.09622.09623.46951.1727
H41.09302.09622.09621.76313.16573.1657
H51.09302.09622.09621.76313.16573.1657
N62.63581.17273.46953.16573.16574.3966
N72.63583.46951.17273.16573.16574.3966

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.760 C1 C3 N7 178.760
C2 C1 C3 111.921 C2 C1 H4 109.323
C2 C1 H5 109.323 C3 C1 H4 109.323
C3 C1 H5 109.323 H4 C1 H5 107.524
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.426      
2 C 0.201      
3 C 0.201      
4 H 0.244      
5 H 0.244      
6 N -0.232      
7 N -0.232      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 120.873
(<r2>)1/2 10.994