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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: HF/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-36.850190
Energy at 298.15K-36.852144
Nuclear repulsion energy61.983305
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 HF/CEP-121G
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 3220 2938 0.67      
2 A1 2506 2286 2.27      
3 A1 1608 1467 20.92      
4 A1 962 878 17.69      
5 A1 631 576 0.45      
6 A1 166 151 11.63      
7 A2 1371 1251 0.00      
8 A2 420 384 0.00      
9 B1 3278 2991 0.04      
10 B1 1069 975 0.01      
11 B1 385 351 0.01      
12 B2 2508 2289 7.77      
13 B2 1496 1366 4.83      
14 B2 1057 964 35.53      
15 B2 419 382 0.29      

Unscaled Zero Point Vibrational Energy (zpe) 10547.8 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 9624.9 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 HF/CEP-121G
ABC
0.69331 0.09709 0.08651

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.846
C2 0.000 1.229 0.022
C3 0.000 -1.229 0.022
H4 0.875 0.000 1.484
H5 -0.875 0.000 1.484
N6 0.000 2.203 -0.594
N7 0.000 -2.203 -0.594

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.47891.47891.08311.08312.63112.6311
C21.47892.45712.10042.10041.15243.4859
C31.47892.45712.10042.10043.48591.1524
H41.08312.10042.10041.74963.15183.1518
H51.08312.10042.10041.74963.15183.1518
N62.63111.15243.48593.15183.15184.4051
N72.63113.48591.15243.15183.15184.4051

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.475 C1 C3 N7 178.475
C2 C1 C3 112.337 C2 C1 H4 109.162
C2 C1 H5 109.162 C3 C1 H4 109.162
C3 C1 H5 109.162 H4 C1 H5 107.748
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.277      
2 C -0.286      
3 C -0.286      
4 H 0.241      
5 H 0.241      
6 N 0.184      
7 N 0.184      


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 4.203 4.203
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.169 0.000 0.000
y 0.000 -44.890 0.000
z 0.000 0.000 -27.451
Traceless
 xyz
x 9.002 0.000 0.000
y 0.000 -17.580 0.000
z 0.000 0.000 8.578
Polar
3z2-r217.156
x2-y217.721
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.358 0.000 0.000
y 0.000 7.064 0.000
z 0.000 0.000 4.608


<r2> (average value of r2) Å2
<r2> 93.095
(<r2>)1/2 9.649