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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-224.347062
Energy at 298.15K-224.348646
HF Energy-223.635818
Nuclear repulsion energy123.691117
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 MP2/6-31G**
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 3147 2947 0.10      
2 A1 2218 2078 1.71      
3 A1 1504 1408 10.09      
4 A1 914 856 5.22      
5 A1 571 535 0.18      
6 A1 141 132 10.03      
7 A2 1270 1189 0.00      
8 A2 346 324 0.00      
9 B1 3204 3000 1.84      
10 B1 962 901 0.22      
11 B1 321 301 0.38      
12 B2 2224 2083 6.58      
13 B2 1375 1287 3.19      
14 B2 1005 941 4.95      
15 B2 349 327 0.53      

Unscaled Zero Point Vibrational Energy (zpe) 9775.0 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 9154.3 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 MP2/6-31G**
ABC
0.67584 0.09690 0.08610

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.852
C2 0.000 1.217 0.031
C3 0.000 -1.217 0.031
H4 0.881 0.000 1.496
H5 -0.881 0.000 1.496
N6 0.000 2.211 -0.605
N7 0.000 -2.211 -0.605

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.46801.46801.09101.09102.64792.6479
C21.46802.43362.09842.09841.18013.4861
C31.46802.43362.09842.09843.48611.1801
H41.09102.09842.09841.76113.17483.1748
H51.09102.09842.09841.76113.17483.1748
N62.64791.18013.48613.17483.17484.4214
N72.64793.48611.18013.17483.17484.4214

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.612 C1 C3 N7 178.612
C2 C1 C3 111.968 C2 C1 H4 109.287
C2 C1 H5 109.287 C3 C1 H4 109.287
C3 C1 H5 109.287 H4 C1 H5 107.625
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.259      
2 C 0.313      
3 C 0.313      
4 H 0.242      
5 H 0.242      
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 3.729 3.729
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.659 0.000 0.000
y 0.000 -41.602 0.000
z 0.000 0.000 -26.909
Traceless
 xyz
x 7.597 0.000 0.000
y 0.000 -14.818 0.000
z 0.000 0.000 7.221
Polar
3z2-r214.442
x2-y214.944
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.285 0.000 0.000
y 0.000 6.740 0.000
z 0.000 0.000 4.569


<r2> (average value of r2) Å2
<r2> 121.222
(<r2>)1/2 11.010