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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-223.646449
Energy at 298.15K-223.648456
Nuclear repulsion energy124.669297
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 B3PW91/3-21G
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 3062 2943 1.16      
2 A1 2373 2281 0.00      
3 A1 1494 1436 26.00      
4 A1 919 883 5.61      
5 A1 633 608 0.06      
6 A1 173 166 6.97      
7 A2 1326 1275 0.00      
8 A2 462 444 0.00      
9 B1 3102 2981 4.38      
10 B1 975 937 0.95      
11 B1 420 403 0.81      
12 B2 2367 2275 0.23      
13 B2 1389 1335 0.78      
14 B2 1001 962 8.73      
15 B2 457 440 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 10075.6 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 9684.6 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 B3PW91/3-21G
ABC
0.67889 0.09867 0.08757

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.846
C2 0.000 1.214 0.033
C3 0.000 -1.214 0.033
H4 0.887 0.000 1.496
H5 -0.887 0.000 1.496
N6 0.000 2.187 -0.605
N7 0.000 -2.187 -0.605

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46091.46091.09981.09982.62422.6242
C21.46092.42762.09782.09781.16333.4597
C31.46092.42762.09782.09783.45971.1633
H41.09982.09782.09781.77473.15953.1595
H51.09982.09782.09781.77473.15953.1595
N62.62421.16333.45973.15953.15954.3731
N72.62423.45971.16333.15953.15954.3731

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 179.444 C1 C3 N7 179.444
C2 C1 C3 112.366 C2 C1 H4 109.197
C2 C1 H5 109.197 C3 C1 H4 109.197
C3 C1 H5 109.197 H4 C1 H5 107.569
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.569      
2 C 0.405      
3 C 0.405      
4 H 0.335      
5 H 0.335      
6 N -0.455      
7 N -0.455      


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 3.645 3.645
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.497 0.000 0.000
y 0.000 -41.154 0.000
z 0.000 0.000 -26.576
Traceless
 xyz
x 7.368 0.000 0.000
y 0.000 -14.617 0.000
z 0.000 0.000 7.249
Polar
3z2-r214.498
x2-y214.657
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.900 0.000 0.000
y 0.000 6.464 0.000
z 0.000 0.000 4.183


<r2> (average value of r2) Å2
<r2> 119.418
(<r2>)1/2 10.928