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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-224.364919
Energy at 298.15K-224.366539
HF Energy-223.641169
Nuclear repulsion energy123.981123
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 3141 2957 0.01      
2 A1 2360 2222 0.05      
3 A1 1510 1422 9.15      
4 A1 913 860 6.92      
5 A1 576 543 0.26      
6 A1 144 136 10.54      
7 A2 1273 1199 0.00      
8 A2 355 334 0.00      
9 B1 3192 3005 0.69      
10 B1 968 911 0.07      
11 B1 328 309 0.63      
12 B2 2361 2223 0.39      
13 B2 1386 1305 4.59      
14 B2 1005 947 7.65      
15 B2 354 333 0.76      

Unscaled Zero Point Vibrational Energy (zpe) 9934.3 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 9352.1 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
0.68246 0.09684 0.08616

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 0.882 0.000 1.492
H5 -0.882 0.000 1.492
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
C11.47541.47541.09101.09102.64192.6419
C21.47542.44842.10362.10361.16673.4896
C31.47542.44842.10362.10363.48961.1667
H41.09102.10362.10361.76323.16743.1674
H51.09102.10362.10361.76323.16743.1674
N62.64191.16673.48963.16743.16744.4177
N72.64193.48961.16673.16743.16744.4177

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.514 C1 C3 N7 178.514
C2 C1 C3 112.146 C2 C1 H4 109.195
C2 C1 H5 109.195 C3 C1 H4 109.195
C3 C1 H5 109.195 H4 C1 H5 107.818
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 -0.258      
2 C 0.312      
3 C 0.312      
4 H 0.241      
5 H 0.241      
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> 121.900
(<r2>)1/2 11.041