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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: PBEPBE/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-224.719752
Energy at 298.15K-224.721302
Nuclear repulsion energy123.694902
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/6-31+G**
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 2951 0.84      
2 A1 2294 2268 0.31      
3 A1 1392 1376 16.02      
4 A1 881 871 4.73      
5 A1 560 554 0.00      
6 A1 138 137 9.56      
7 A2 1195 1181 0.00      
8 A2 356 352 0.00      
9 B1 3028 2994 4.40      
10 B1 895 885 0.33      
11 B1 324 321 0.00      
12 B2 2288 2262 2.10      
13 B2 1288 1273 2.64      
14 B2 970 959 3.70      
15 B2 353 349 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 9473.9 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 9365.9 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/6-31+G**
ABC
0.69353 0.09593 0.08564

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.837
C2 0.000 1.226 0.026
C3 0.000 -1.226 0.026
H4 0.889 0.000 1.494
H5 -0.889 0.000 1.494
N6 0.000 2.220 -0.595
N7 0.000 -2.220 -0.595

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.47031.47031.10571.10572.64202.6420
C21.47032.45292.10952.10951.17193.5021
C31.47032.45292.10952.10953.50211.1719
H41.10572.10952.10951.77873.17573.1757
H51.10572.10952.10951.77873.17573.1757
N62.64201.17193.50213.17573.17574.4400
N72.64203.50211.17193.17573.17574.4400

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.557 C1 C3 N7 178.557
C2 C1 C3 113.061 C2 C1 H4 109.130
C2 C1 H5 109.130 C3 C1 H4 109.130
C3 C1 H5 109.130 H4 C1 H5 107.086
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.310      
2 C 0.317      
3 C 0.317      
4 H 0.257      
5 H 0.257      
6 N -0.419      
7 N -0.419      


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 3.835 3.835
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.149 0.000 0.000
y 0.000 -42.866 0.000
z 0.000 0.000 -27.031
Traceless
 xyz
x 7.800 0.000 0.000
y 0.000 -15.776 0.000
z 0.000 0.000 7.976
Polar
3z2-r215.952
x2-y215.718
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.198 0.000 0.000
y 0.000 8.693 0.000
z 0.000 0.000 5.577


<r2> (average value of r2) Å2
<r2> 122.473
(<r2>)1/2 11.067