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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: QCISD/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-224.375790
Energy at 298.15K-224.377370
HF Energy-223.646966
Nuclear repulsion energy123.880908
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/6-31+G**
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 3136 2965 0.02      
2 A1 2349 2221 0.02      
3 A1 1505 1423 9.65      
4 A1 909 860 8.36      
5 A1 572 541 0.06      
6 A1 144 136 10.80      
7 A2 1265 1196 0.00      
8 A2 342 324 0.00      
9 B1 3188 3014 1.44      
10 B1 962 910 0.04      
11 B1 317 300 0.22      
12 B2 2350 2222 0.11      
13 B2 1381 1306 6.51      
14 B2 1003 948 8.37      
15 B2 346 327 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 9884.8 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 9345.0 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/6-31+G**
ABC
0.69121 0.09624 0.08583

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.846
C2 0.000 1.225 0.023
C3 0.000 -1.225 0.023
H4 0.883 0.000 1.487
H5 -0.883 0.000 1.487
N6 0.000 2.216 -0.595
N7 0.000 -2.216 -0.595

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.47611.47611.09101.09102.64312.6431
C21.47612.45102.10342.10341.16743.4966
C31.47612.45102.10342.10343.49661.1674
H41.09102.10342.10341.76553.16593.1659
H51.09102.10342.10341.76553.16593.1659
N62.64311.16743.49663.16593.16594.4324
N72.64313.49661.16743.16593.16594.4324

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.053 C1 C3 N7 178.053
C2 C1 C3 112.243 C2 C1 H4 109.122
C2 C1 H5 109.122 C3 C1 H4 109.122
C3 C1 H5 109.122 H4 C1 H5 108.018
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at QCISD/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.026      
2 C 0.133      
3 C 0.133      
4 H 0.240      
5 H 0.240      
6 N -0.359      
7 N -0.359      


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> 0.000
(<r2>)1/2 0.000