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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-222.901351
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 2933 0.01      
2 A1 2299 2209 1.09      
3 A1 1533 1473 16.45      
4 A1 885 850 8.04      
5 A1 602 579 0.09      
6 A1 168 161 7.29      
7 A2 1328 1276 0.00      
8 A2 424 407 0.00      
9 B1 3087 2967 0.60      
10 B1 993 955 0.04      
11 B1 393 377 0.18      
12 B2 2297 2208 2.75      
13 B2 1402 1347 0.08      
14 B2 962 925 10.36      
15 B2 421 405 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 9922.2 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 9536.2 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
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> 0.000
(<r2>)1/2 0.000