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: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-224.233071
Energy at 298.15K-224.234837
HF Energy-223.642231
Nuclear repulsion energy125.043250
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 CISD/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 3191 2954 0.49      
2 A1 2507 2321 0.41      
3 A1 1547 1432 12.63      
4 A1 949 879 7.85      
5 A1 609 564 0.78      
6 A1 154 142 11.91      
7 A2 1312 1215 0.00      
8 A2 387 359 0.00      
9 B1 3241 3000 2.19      
10 B1 1003 929 0.45      
11 B1 355 329 0.86      
12 B2 2502 2317 0.68      
13 B2 1433 1327 3.81      
14 B2 1040 963 12.09      
15 B2 386 358 1.10      

Unscaled Zero Point Vibrational Energy (zpe) 10307.7 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 9542.8 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 CISD/6-31G*
ABC
0.69404 0.09836 0.08754

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.843
C2 0.000 1.218 0.023
C3 0.000 -1.218 0.023
H4 0.880 0.000 1.485
H5 -0.880 0.000 1.485
N6 0.000 2.189 -0.594
N7 0.000 -2.189 -0.594

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46841.46841.08891.08892.61862.6186
C21.46842.43652.09622.09621.15043.4628
C31.46842.43652.09622.09623.46281.1504
H41.08892.09622.09621.75943.14433.1443
H51.08892.09622.09621.75943.14433.1443
N62.61861.15043.46283.14433.14434.3783
N72.61863.46281.15043.14433.14434.3783

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.501 C1 C3 N7 178.501
C2 C1 C3 112.123 C2 C1 H4 109.210
C2 C1 H5 109.210 C3 C1 H4 109.210
C3 C1 H5 109.210 H4 C1 H5 107.781
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at CISD/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.382      
2 C 0.326      
3 C 0.326      
4 H 0.288      
5 H 0.288      
6 N -0.422      
7 N -0.422      


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> 119.194
(<r2>)1/2 10.918