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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-222.899480
Energy at 298.15K-222.901360
HF Energy-222.386078
Nuclear repulsion energy123.374406
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 QCISD/3-21G
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 3051 2957 0.01      
2 A1 2299 2228 1.09      
3 A1 1533 1486 16.45      
4 A1 885 857 8.04      
5 A1 602 584 0.09      
6 A1 168 163 7.29      
7 A2 1328 1287 0.00      
8 A2 424 411 0.00      
9 B1 3087 2992 0.60      
10 B1 993 963 0.04      
11 B1 393 381 0.18      
12 B2 2297 2226 2.75      
13 B2 1402 1358 0.08      
14 B2 962 932 10.36      
15 B2 421 408 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 9922.2 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 9616.6 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 QCISD/3-21G
ABC
0.66037 0.09666 0.08569

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.863
C2 0.000 1.229 0.032
C3 0.000 -1.229 0.032
H4 0.890 0.000 1.510
H5 -0.890 0.000 1.510
N6 0.000 2.208 -0.613
N7 0.000 -2.208 -0.613

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.48311.48311.10071.10072.65572.6557
C21.48312.45742.11802.11801.17273.4969
C31.48312.45742.11802.11803.49691.1727
H41.10072.11802.11801.78073.18973.1897
H51.10072.11802.11801.78073.18973.1897
N62.65571.17273.49693.18973.18974.4164
N72.65573.49691.17273.18973.18974.4164

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 179.307 C1 C3 N7 179.307
C2 C1 C3 111.889 C2 C1 H4 109.224
C2 C1 H5 109.224 C3 C1 H4 109.224
C3 C1 H5 109.224 H4 C1 H5 107.973
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at QCISD/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.472      
2 C 0.368      
3 C 0.368      
4 H 0.335      
5 H 0.335      
6 N -0.467      
7 N -0.467      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 122.039
(<r2>)1/2 11.047