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All results from a given calculation for C3H2N2 (Malononitrile)

using model chemistry: CCSD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-224.377745
Energy at 298.15K-224.379281
HF Energy-223.635619
Nuclear repulsion energy123.609477
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 CCSD(T)/6-31G*
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 3076 2959        
2 A1 2314 2226        
3 A1 1497 1440        
4 A1 902 868        
5 A1 565 544        
6 A1 139 133        
7 A2 1258 1210        
8 A2 342 329        
9 B1 3122 3004        
10 B1 958 922        
11 B1 316 304        
12 B2 2314 2226        
13 B2 1368 1316        
14 B2 995 957        
15 B2 338 326        

Unscaled Zero Point Vibrational Energy (zpe) 9751.5 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 9381.9 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 CCSD(T)/6-31G*
ABC
0.67723 0.09644 0.08578

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.852
C2 0.000 1.225 0.027
C3 0.000 -1.225 0.027
H4 0.887 0.000 1.501
H5 -0.887 0.000 1.501
N6 0.000 2.214 -0.602
N7 0.000 -2.214 -0.602

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.47701.47701.09861.09862.64892.6489
C21.47702.44902.11172.11171.17213.4951
C31.47702.44902.11172.11173.49511.1721
H41.09862.11172.11171.77383.17963.1796
H51.09862.11172.11171.77383.17963.1796
N62.64891.17213.49513.17963.17964.4271
N72.64893.49511.17213.17963.17964.4271

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 178.459 C1 C3 N7 178.459
C2 C1 C3 112.005 C2 C1 H4 109.267
C2 C1 H5 109.267 C3 C1 H4 109.267
C3 C1 H5 109.267 H4 C1 H5 107.671
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at CCSD(T)/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.383      
2 C 0.328      
3 C 0.328      
4 H 0.288      
5 H 0.288      
6 N -0.425      
7 N -0.425      


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> 122.368
(<r2>)1/2 11.062