return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: CCD/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 CCD/6-31G(2df,p)
 hartrees
Energy at 0K-224.468346
Energy at 298.15K-224.470053
HF Energy-223.660797
Nuclear repulsion energy124.758294
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 CCD/6-31G(2df,p)
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 3124 2959 0.56      
2 A1 2403 2276 0.01      
3 A1 1483 1405 10.54      
4 A1 915 867 5.31      
5 A1 589 558 0.90      
6 A1 149 141 11.53      
7 A2 1270 1203 0.00      
8 A2 376 357 0.00      
9 B1 3173 3005 3.17      
10 B1 961 910 0.42      
11 B1 347 329 1.27      
12 B2 2402 2276 0.10      
13 B2 1375 1303 4.26      
14 B2 1008 955 7.07      
15 B2 376 356 1.24      

Unscaled Zero Point Vibrational Energy (zpe) 9975.9 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 9449.2 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 CCD/6-31G(2df,p)
ABC
0.69141 0.09796 0.08719

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.844
C2 0.000 1.220 0.025
C3 0.000 -1.220 0.025
H4 0.882 0.000 1.488
H5 -0.882 0.000 1.488
N6 0.000 2.194 -0.595
N7 0.000 -2.194 -0.595

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46921.46921.09231.09232.62392.6239
C21.46922.43952.09932.09931.15493.4697
C31.46922.43952.09932.09933.46971.1549
H41.09232.09932.09931.76423.15153.1515
H51.09232.09932.09931.76423.15153.1515
N62.62391.15493.46973.15153.15154.3881
N72.62393.46971.15493.15153.15154.3881

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.599 C1 C3 N7 178.599
C2 C1 C3 112.247 C2 C1 H4 109.195
C2 C1 H5 109.195 C3 C1 H4 109.195
C3 C1 H5 109.195 H4 C1 H5 107.706
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at CCD/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.429      
2 C 0.185      
3 C 0.185      
4 H 0.243      
5 H 0.243      
6 N -0.214      
7 N -0.214      


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> 120.517
(<r2>)1/2 10.978