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All results from a given calculation for C(CN)4 (tetracyanomethane)

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-408.508396
Energy at 298.15K-408.507148
HF Energy-407.062673
Nuclear repulsion energy322.666455
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/6-31G(2df,p)
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 2374 2249 0.00      
2 A1 590 559 0.00      
3 E 577 547 0.00      
3 E 577 547 0.00      
4 E 114 108 0.00      
4 E 114 108 0.00      
5 T1 342 324 0.00      
5 T1 342 324 0.00      
5 T1 342 324 0.00      
6 T2 2369 2244 10.97      
6 T2 2369 2244 10.97      
6 T2 2369 2244 10.97      
7 T2 1105 1047 30.12      
7 T2 1105 1047 30.12      
7 T2 1105 1047 30.12      
8 T2 560 531 0.23      
8 T2 560 531 0.23      
8 T2 560 531 0.23      
9 T2 149 141 14.81      
9 T2 149 141 14.81      
9 T2 149 141 14.81      

Unscaled Zero Point Vibrational Energy (zpe) 8960.6 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 8489.2 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/6-31G(2df,p)
ABC
0.05091 0.05091 0.05091

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.857 0.857 0.857
C3 -0.857 -0.857 0.857
C4 -0.857 0.857 -0.857
C5 0.857 -0.857 -0.857
N6 1.525 1.525 1.525
N7 -1.525 -1.525 1.525
N8 -1.525 1.525 -1.525
N9 1.525 -1.525 -1.525

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.48411.48411.48411.48412.64182.64182.64182.6418
C21.48412.42352.42352.42351.15783.43453.43453.4345
C31.48412.42352.42352.42353.43451.15783.43453.4345
C41.48412.42352.42352.42353.43453.43451.15783.4345
C51.48412.42352.42352.42353.43453.43453.43451.1578
N62.64181.15783.43453.43453.43454.31414.31414.3141
N72.64183.43451.15783.43453.43454.31414.31414.3141
N82.64183.43453.43451.15783.43454.31414.31414.3141
N92.64183.43453.43453.43451.15784.31414.31414.3141

picture of tetracyanomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 180.000 C1 C3 N7 180.000
C1 C4 N8 180.000 C1 C5 N9 180.000
C2 C1 C3 109.471 C2 C1 C4 109.471
C2 C1 C5 109.471 C3 C1 C4 109.471
C3 C1 C5 109.471 C4 C1 C5 109.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability