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: HF/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/6-311G**
 hartrees
Energy at 0K-223.696299
Energy at 298.15K-223.698251
Nuclear repulsion energy126.169526
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 HF/6-311G**
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 3225 2930 0.07      
2 A1 2622 2382 1.91      
3 A1 1575 1431 11.88      
4 A1 966 878 9.53      
5 A1 640 582 1.84      
6 A1 166 151 13.31      
7 A2 1356 1232 0.00      
8 A2 425 386 0.00      
9 B1 3271 2972 1.37      
10 B1 1036 941 0.13      
11 B1 386 351 1.10      
12 B2 2620 2380 6.40      
13 B2 1473 1338 8.49      
14 B2 1048 952 17.68      
15 B2 426 387 1.55      

Unscaled Zero Point Vibrational Energy (zpe) 10616.9 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 9645.5 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 HF/6-311G**
ABC
0.71030 0.09945 0.08866

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.836
C2 0.000 1.220 0.019
C3 0.000 -1.220 0.019
H4 0.877 0.000 1.471
H5 -0.877 0.000 1.471
N6 0.000 2.173 -0.584
N7 0.000 -2.173 -0.584

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46881.46881.08291.08292.59572.5957
C21.46882.44082.09002.09001.12713.4463
C31.46882.44082.09002.09003.44631.1271
H41.08292.09002.09001.75433.11673.1167
H51.08292.09002.09001.75433.11673.1167
N62.59571.12713.44633.11673.11674.3456
N72.59573.44631.12713.11673.11674.3456

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.519 C1 C3 N7 178.519
C2 C1 C3 112.379 C2 C1 H4 109.045
C2 C1 H5 109.045 C3 C1 H4 109.045
C3 C1 H5 109.045 H4 C1 H5 108.196
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.044      
2 C 0.120      
3 C 0.120      
4 H 0.201      
5 H 0.201      
6 N -0.300      
7 N -0.300      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 4.019 4.019
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.889 0.000 0.000
y 0.000 -43.236 0.000
z 0.000 0.000 -26.975
Traceless
 xyz
x 8.216 0.000 0.000
y 0.000 -16.304 0.000
z 0.000 0.000 8.088
Polar
3z2-r216.176
x2-y216.347
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.413 0.000 0.000
y 0.000 6.911 0.000
z 0.000 0.000 4.578


<r2> (average value of r2) Å2
<r2> 119.022
(<r2>)1/2 10.910