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: PBEPBE/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 PBEPBE/6-31G**
 hartrees
Energy at 0K-224.709396
Energy at 298.15K-224.710971
Nuclear repulsion energy123.747499
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 PBEPBE/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 2985 2944 0.45      
2 A1 2303 2272 0.25      
3 A1 1397 1378 14.13      
4 A1 885 873 3.61      
5 A1 563 556 0.11      
6 A1 139 137 9.02      
7 A2 1195 1178 0.00      
8 A2 363 358 0.00      
9 B1 3027 2986 2.73      
10 B1 900 887 1.11      
11 B1 332 327 0.08      
12 B2 2297 2266 1.07      
13 B2 1289 1272 1.90      
14 B2 971 958 3.43      
15 B2 360 355 0.22      

Unscaled Zero Point Vibrational Energy (zpe) 9503.0 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 9372.9 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 PBEPBE/6-31G**
ABC
0.68841 0.09627 0.08583

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.840
C2 0.000 1.225 0.028
C3 0.000 -1.225 0.028
H4 0.888 0.000 1.498
H5 -0.888 0.000 1.498
N6 0.000 2.216 -0.598
N7 0.000 -2.216 -0.598

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46981.46981.10571.10572.64132.6413
C21.46982.45092.10972.10971.17173.4976
C31.46982.45092.10972.10973.49761.1717
H41.10572.10972.10971.77673.17693.1769
H51.10572.10972.10971.77673.17693.1769
N62.64131.17173.49763.17693.17694.4310
N72.64133.49761.17173.17693.17694.4310

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.824 C1 C3 N7 178.824
C2 C1 C3 112.981 C2 C1 H4 109.190
C2 C1 H5 109.190 C3 C1 H4 109.190
C3 C1 H5 109.190 H4 C1 H5 106.920
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.343      
2 C 0.370      
3 C 0.370      
4 H 0.228      
5 H 0.228      
6 N -0.426      
7 N -0.426      


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 3.636 3.636
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.306 0.000 0.000
y 0.000 -41.040 0.000
z 0.000 0.000 -26.220
Traceless
 xyz
x 7.324 0.000 0.000
y 0.000 -14.778 0.000
z 0.000 0.000 7.453
Polar
3z2-r214.907
x2-y214.735
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.391 0.000 0.000
y 0.000 7.588 0.000
z 0.000 0.000 4.761


<r2> (average value of r2) Å2
<r2> 121.539
(<r2>)1/2 11.024