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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: MP2/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 MP2/CEP-121G*
 hartrees
Energy at 0K-37.665266
Energy at 298.15K-37.666775
HF Energy-36.961067
Nuclear repulsion energy61.193996
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/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 3111 2964 0.03      
2 A1 2148 2047 2.22      
3 A1 1499 1428 12.43      
4 A1 895 852 8.27      
5 A1 561 535 0.01      
6 A1 137 130 9.16      
7 A2 1260 1200 0.00      
8 A2 329 314 0.00      
9 B1 3174 3024 1.27      
10 B1 946 901 0.01      
11 B1 305 291 0.01      
12 B2 2155 2053 7.62      
13 B2 1359 1295 4.01      
14 B2 978 932 7.65      
15 B2 339 323 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 9597.0 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 9144.0 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/CEP-121G*
ABC
0.65580 0.09627 0.08529

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.869
C2 0.000 1.223 0.032
C3 0.000 -1.223 0.032
H4 0.888 0.000 1.508
H5 -0.888 0.000 1.508
N6 0.000 2.217 -0.615
N7 0.000 -2.217 -0.615

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.48201.48201.09471.09472.66732.6673
C21.48202.44632.11322.11321.18543.5001
C31.48202.44632.11322.11323.50011.1854
H41.09472.11322.11321.77653.19553.1955
H51.09472.11322.11321.77653.19553.1955
N62.66731.18543.50013.19553.19554.4335
N72.66733.50011.18543.19553.19554.4335

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.675 C1 C3 N7 178.675
C2 C1 C3 111.242 C2 C1 H4 109.271
C2 C1 H5 109.271 C3 C1 H4 109.271
C3 C1 H5 109.271 H4 C1 H5 108.468
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.248      
2 C -0.092      
3 C -0.092      
4 H 0.262      
5 H 0.262      
6 N -0.046      
7 N -0.046      


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 3.907 3.907
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.894 0.000 0.000
y 0.000 -42.042 0.000
z 0.000 0.000 -26.960
Traceless
 xyz
x 7.608 0.000 0.000
y 0.000 -15.116 0.000
z 0.000 0.000 7.508
Polar
3z2-r215.016
x2-y215.149
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.714 0.000 0.000
y 0.000 7.219 0.000
z 0.000 0.000 5.035


<r2> (average value of r2) Å2
<r2> 93.958
(<r2>)1/2 9.693