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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-224.706749
Energy at 298.15K-224.708324
Nuclear repulsion energy123.719280
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 2942 0.34      
2 A1 2303 2271 0.22      
3 A1 1417 1397 14.16      
4 A1 887 874 3.58      
5 A1 564 556 0.12      
6 A1 140 138 8.97      
7 A2 1210 1193 0.00      
8 A2 364 359 0.00      
9 B1 3024 2981 2.15      
10 B1 913 900 1.21      
11 B1 333 329 0.08      
12 B2 2298 2265 0.99      
13 B2 1305 1286 1.99      
14 B2 973 960 3.70      
15 B2 361 356 0.24      

Unscaled Zero Point Vibrational Energy (zpe) 9538.2 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 9401.8 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
0.68548 0.09635 0.08585

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 0.842
C2 0.000 1.225 0.029
C3 0.000 -1.225 0.029
H4 0.889 0.000 1.501
H5 -0.889 0.000 1.501
N6 0.000 2.214 -0.600
N7 0.000 -2.214 -0.600

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.47061.47061.10671.10672.64212.6421
C21.47062.45102.11182.11181.17173.4968
C31.47062.45102.11182.11183.49681.1717
H41.10672.11182.11181.77713.17923.1792
H51.10672.11182.11181.77713.17923.1792
N62.64211.17173.49683.17923.17924.4288
N72.64213.49681.17173.17923.17924.4288

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.880 C1 C3 N7 178.880
C2 C1 C3 112.887 C2 C1 H4 109.238
C2 C1 H5 109.238 C3 C1 H4 109.238
C3 C1 H5 109.238 H4 C1 H5 106.820
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 -0.457      
2 C 0.389      
3 C 0.389      
4 H 0.266      
5 H 0.266      
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 3.635 3.635
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.308 0.000 0.000
y 0.000 -41.022 0.000
z 0.000 0.000 -26.243
Traceless
 xyz
x 7.325 0.000 0.000
y 0.000 -14.746 0.000
z 0.000 0.000 7.421
Polar
3z2-r214.843
x2-y214.714
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.373 0.000 0.000
y 0.000 7.551 0.000
z 0.000 0.000 4.747


<r2> (average value of r2) Å2
<r2> 121.534
(<r2>)1/2 11.024