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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: QCISD/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 QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-224.477959
Energy at 298.15K-224.479646
HF Energy-223.659817
Nuclear repulsion energy124.538799
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 QCISD/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 3116 2952 0.40      
2 A1 2371 2246 0.00      
3 A1 1481 1403 10.31      
4 A1 908 860 5.23      
5 A1 584 554 0.78      
6 A1 148 140 11.41      
7 A2 1265 1199 0.00      
8 A2 373 354 0.00      
9 B1 3164 2997 2.67      
10 B1 957 906 0.36      
11 B1 344 326 1.23      
12 B2 2370 2246 0.03      
13 B2 1369 1297 4.21      
14 B2 1001 948 6.60      
15 B2 372 352 1.18      

Unscaled Zero Point Vibrational Energy (zpe) 9911.0 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 9389.7 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 QCISD/6-31G(2df,p)
ABC
0.68930 0.09763 0.08690

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.845
C2 0.000 1.221 0.025
C3 0.000 -1.221 0.025
H4 0.883 0.000 1.489
H5 -0.883 0.000 1.489
N6 0.000 2.198 -0.596
N7 0.000 -2.198 -0.596

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.47061.47061.09281.09282.62862.6286
C21.47062.44192.10082.10081.15823.4751
C31.47062.44192.10082.10083.47511.1582
H41.09282.10082.10081.76533.15623.1562
H51.09282.10082.10081.76533.15623.1562
N62.62861.15823.47513.15623.15624.3963
N72.62863.47511.15823.15623.15624.3963

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.584 C1 C3 N7 178.584
C2 C1 C3 112.242 C2 C1 H4 109.188
C2 C1 H5 109.188 C3 C1 H4 109.188
C3 C1 H5 109.188 H4 C1 H5 107.742
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at QCISD/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.428      
2 C 0.187      
3 C 0.187      
4 H 0.243      
5 H 0.243      
6 N -0.217      
7 N -0.217      


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> 120.864
(<r2>)1/2 10.994