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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-224.349745
Energy at 298.15K-224.351351
HF Energy-223.637655
Nuclear repulsion energy123.908423
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*
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 3094 2946 0.04      
2 A1 2360 2248 0.03      
3 A1 1508 1436 11.95      
4 A1 913 870 6.79      
5 A1 577 549 0.27      
6 A1 144 137 10.64      
7 A2 1270 1209 0.00      
8 A2 355 338 0.00      
9 B1 3140 2990 0.99      
10 B1 969 923 0.26      
11 B1 329 313 0.50      
12 B2 2361 2248 0.28      
13 B2 1384 1318 2.65      
14 B2 1006 958 8.41      
15 B2 353 336 0.69      

Unscaled Zero Point Vibrational Energy (zpe) 9881.0 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 9409.6 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*
ABC
0.68194 0.09676 0.08611

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.850
C2 0.000 1.224 0.026
C3 0.000 -1.224 0.026
H4 0.886 0.000 1.497
H5 -0.886 0.000 1.497
N6 0.000 2.209 -0.600
N7 0.000 -2.209 -0.600

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.47561.47561.09721.09722.64212.6421
C21.47562.44832.10922.10921.16683.4897
C31.47562.44832.10922.10923.48971.1668
H41.09722.10922.10921.77103.17223.1722
H51.09722.10922.10921.77103.17223.1722
N62.64211.16683.48973.17223.17224.4182
N72.64213.48971.16683.17223.17224.4182

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.473 C1 C3 N7 178.473
C2 C1 C3 112.113 C2 C1 H4 109.250
C2 C1 H5 109.250 C3 C1 H4 109.250
C3 C1 H5 109.250 H4 C1 H5 107.624
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at QCISD/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.383      
2 C 0.328      
3 C 0.328      
4 H 0.288      
5 H 0.288      
6 N -0.424      
7 N -0.424      


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> 121.971
(<r2>)1/2 11.044