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/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-223.728983
Energy at 298.15K-223.730917
HF Energy-223.728983
Nuclear repulsion energy126.310649
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/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3221 2919 0.30      
2 A1 2616 2371 1.84      
3 A1 1576 1429 10.84      
4 A1 962 872 8.40      
5 A1 639 579 2.41      
6 A1 166 150 14.57      
7 A2 1353 1226 0.00      
8 A2 421 382 0.00      
9 B1 3265 2959 2.20      
10 B1 1036 939 0.22      
11 B1 383 347 2.22      
12 B2 2613 2368 8.24      
13 B2 1471 1333 10.70      
14 B2 1042 945 15.74      
15 B2 422 383 1.98      

Unscaled Zero Point Vibrational Energy (zpe) 10592.7 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 9601.2 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/Def2TZVPP
ABC
0.71710 0.09937 0.08869

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.833
C2 0.000 1.220 0.016
C3 0.000 -1.220 0.016
H4 0.876 0.000 1.467
H5 -0.876 0.000 1.467
N6 0.000 2.173 -0.581
N7 0.000 -2.173 -0.581

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46831.46831.08091.08092.59222.5922
C21.46832.44002.08782.08781.12423.4448
C31.46832.44002.08782.08783.44481.1242
H41.08092.08782.08781.75183.11103.1110
H51.08092.08782.08781.75183.11103.1110
N62.59221.12423.44483.11103.11104.3454
N72.59223.44481.12423.11103.11104.3454

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.250 C1 C3 N7 178.250
C2 C1 C3 112.380 C2 C1 H4 109.029
C2 C1 H5 109.029 C3 C1 H4 109.029
C3 C1 H5 109.029 H4 C1 H5 108.261
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.206      
2 C -0.153      
3 C -0.153      
4 H 0.140      
5 H 0.140      
6 N -0.090      
7 N -0.090      


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 4.058 4.058
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.961 0.000 0.000
y 0.000 -43.581 0.000
z 0.000 0.000 -27.029
Traceless
 xyz
x 8.344 0.000 0.000
y 0.000 -16.586 0.000
z 0.000 0.000 8.242
Polar
3z2-r216.484
x2-y216.620
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.012 0.000 0.000
y 0.000 7.477 0.000
z 0.000 0.000 5.094


<r2> (average value of r2) Å2
<r2> 119.062
(<r2>)1/2 10.912