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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-222.892973
Energy at 298.15K-222.894833
HF Energy-222.380440
Nuclear repulsion energy122.932897
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 MP2/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3096 2945 0.07      
2 A1 2147 2042 4.54      
3 A1 1553 1477 16.19      
4 A1 887 844 6.41      
5 A1 600 571 0.03      
6 A1 166 158 6.96      
7 A2 1340 1275 0.00      
8 A2 419 398 0.00      
9 B1 3136 2984 1.25      
10 B1 1004 955 0.10      
11 B1 389 370 0.35      
12 B2 2149 2044 11.91      
13 B2 1412 1343 0.13      
14 B2 961 915 6.72      
15 B2 420 399 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 9838.7 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 9359.5 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 MP2/3-21G*
ABC
0.65707 0.09620 0.08526

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.863
C2 0.000 1.224 0.036
C3 0.000 -1.224 0.036
H4 0.887 0.000 1.510
H5 -0.887 0.000 1.510
N6 0.000 2.217 -0.616
N7 0.000 -2.217 -0.616

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.47801.47801.09781.09782.66552.6655
C21.47802.44902.11182.11181.18763.5028
C31.47802.44902.11182.11183.50281.1876
H41.09782.11182.11181.77453.19743.1974
H51.09782.11182.11181.77453.19743.1974
N62.66551.18763.50283.19743.19744.4342
N72.66553.50281.18763.19743.19744.4342

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 179.239 C1 C3 N7 179.239
C2 C1 C3 111.889 C2 C1 H4 109.257
C2 C1 H5 109.257 C3 C1 H4 109.257
C3 C1 H5 109.257 H4 C1 H5 107.837
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.476      
2 C 0.365      
3 C 0.365      
4 H 0.337      
5 H 0.337      
6 N -0.464      
7 N -0.464      


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 2.881 0.000 0.000
y 0.000 5.926 0.000
z 0.000 0.000 4.054


<r2> (average value of r2) Å2
<r2> 122.791
(<r2>)1/2 11.081