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: CISD/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 CISD/6-311G*
 hartrees
Energy at 0K-224.303274
Energy at 298.15K-224.305093
Nuclear repulsion energy125.444597
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 CISD/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 3185 2947 0.15      
2 A1 2494 2307 0.30      
3 A1 1537 1423 14.16      
4 A1 946 875 7.78      
5 A1 616 570 0.80      
6 A1 157 145 11.59      
7 A2 1321 1223 0.00      
8 A2 397 367 0.00      
9 B1 3232 2991 1.74      
10 B1 996 922 0.27      
11 B1 363 336 0.45      
12 B2 2489 2303 0.56      
13 B2 1427 1320 3.65      
14 B2 1034 957 12.43      
15 B2 399 370 0.88      

Unscaled Zero Point Vibrational Energy (zpe) 10296.6 cm-1
Scaled (by 0.9253) Zero Point Vibrational Energy (zpe) 9527.5 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 CISD/6-311G*
ABC
0.69873 0.09885 0.08801

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.840
C2 0.000 1.218 0.023
C3 0.000 -1.218 0.023
H4 0.878 0.000 1.481
H5 -0.878 0.000 1.481
N6 0.000 2.182 -0.591
N7 0.000 -2.182 -0.591

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46691.46691.08731.08732.61002.6100
C21.46692.43592.09332.09331.14333.4553
C31.46692.43592.09332.09333.45531.1433
H41.08732.09332.09331.75683.13523.1352
H51.08732.09332.09331.75683.13523.1352
N62.61001.14333.45533.13523.13524.3646
N72.61003.45531.14333.13523.13524.3646

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.621 C1 C3 N7 178.621
C2 C1 C3 112.258 C2 C1 H4 109.176
C2 C1 H5 109.176 C3 C1 H4 109.176
C3 C1 H5 109.176 H4 C1 H5 107.775
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at CISD/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.424      
2 C 0.191      
3 C 0.191      
4 H 0.321      
5 H 0.321      
6 N -0.299      
7 N -0.299      


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