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: HSEh1PBE/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 HSEh1PBE/6-31G*
 hartrees
Energy at 0K-224.729656
Energy at 298.15K-224.731347
Nuclear repulsion energy124.803621
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 HSEh1PBE/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 3084 2933 0.87      
2 A1 2420 2301 0.69      
3 A1 1466 1394 15.01      
4 A1 921 876 4.69      
5 A1 589 560 0.38      
6 A1 147 139 10.29      
7 A2 1256 1194 0.00      
8 A2 382 364 0.00      
9 B1 3129 2976 3.28      
10 B1 948 902 1.29      
11 B1 348 331 0.31      
12 B2 2416 2297 2.30      
13 B2 1362 1295 2.29      
14 B2 1011 962 6.37      
15 B2 379 361 0.59      

Unscaled Zero Point Vibrational Energy (zpe) 9928.5 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 9442.0 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 HSEh1PBE/6-31G*
ABC
0.69662 0.09794 0.08727

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.837
C2 0.000 1.218 0.026
C3 0.000 -1.218 0.026
H4 0.882 0.000 1.489
H5 -0.882 0.000 1.489
N6 0.000 2.195 -0.594
N7 0.000 -2.195 -0.594

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46311.46311.09711.09712.62012.6201
C21.46312.43612.09792.09791.15723.4690
C31.46312.43612.09792.09793.46901.1572
H41.09712.09792.09791.76503.15183.1518
H51.09712.09792.09791.76503.15183.1518
N62.62011.15723.46903.15183.15184.3901
N72.62013.46901.15723.15183.15184.3901

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.761 C1 C3 N7 178.761
C2 C1 C3 112.717 C2 C1 H4 109.218
C2 C1 H5 109.218 C3 C1 H4 109.218
C3 C1 H5 109.218 H4 C1 H5 107.095
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.462      
2 C 0.384      
3 C 0.384      
4 H 0.283      
5 H 0.283      
6 N -0.436      
7 N -0.436      


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 3.751 3.751
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.285 0.000 0.000
y 0.000 -41.400 0.000
z 0.000 0.000 -26.258
Traceless
 xyz
x 7.543 0.000 0.000
y 0.000 -15.128 0.000
z 0.000 0.000 7.585
Polar
3z2-r215.169
x2-y215.114
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.308 0.000 0.000
y 0.000 7.193 0.000
z 0.000 0.000 4.600


<r2> (average value of r2) Å2
<r2> 119.954
(<r2>)1/2 10.952