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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: B3PW91/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-224.959591
Energy at 298.15K-224.961275
Nuclear repulsion energy125.320938
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/cc-pVTZ
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 3053 2935 0.99      
2 A1 2387 2295 0.59      
3 A1 1435 1380 14.53      
4 A1 908 873 4.16      
5 A1 588 565 0.46      
6 A1 146 141 11.05      
7 A2 1239 1191 0.00      
8 A2 374 360 0.00      
9 B1 3092 2973 4.20      
10 B1 930 894 0.53      
11 B1 339 326 0.43      
12 B2 2382 2290 2.68      
13 B2 1335 1284 3.37      
14 B2 996 958 4.69      
15 B2 375 360 0.53      

Unscaled Zero Point Vibrational Energy (zpe) 9788.2 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 9412.3 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 B3PW91/cc-pVTZ
ABC
0.71157 0.09822 0.08771

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.828
C2 0.000 1.217 0.023
C3 0.000 -1.217 0.023
H4 0.881 0.000 1.477
H5 -0.881 0.000 1.477
N6 0.000 2.192 -0.586
N7 0.000 -2.192 -0.586

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.45961.45961.09381.09382.60822.6082
C21.45962.43452.09082.09081.14893.4627
C31.45962.43452.09082.09083.46271.1489
H41.09382.09082.09081.76123.13593.1359
H51.09382.09082.09081.76123.13593.1359
N62.60821.14893.46273.13593.13594.3830
N72.60823.46271.14893.13593.13594.3830

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.511 C1 C3 N7 178.511
C2 C1 C3 113.017 C2 C1 H4 109.104
C2 C1 H5 109.104 C3 C1 H4 109.104
C3 C1 H5 109.104 H4 C1 H5 107.247
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.096 0.000    
2 C -0.069 0.000    
3 C -0.069 0.000    
4 H 0.155 0.000    
5 H 0.155 0.000    
6 N -0.038 0.000    
7 N -0.038 0.000    


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 3.801 3.801
CHELPG 0.000 0.000 0.000 0.000
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.579 0.000 0.000
y 0.000 -42.126 0.000
z 0.000 0.000 -26.554
Traceless
 xyz
x 7.761 0.000 0.000
y 0.000 -15.560 0.000
z 0.000 0.000 7.799
Polar
3z2-r215.598
x2-y215.547
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.055 0.000 0.000
y 0.000 7.890 0.000
z 0.000 0.000 5.262


<r2> (average value of r2) Å2
<r2> 118.901
(<r2>)1/2 10.904