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

using model chemistry: CISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-407.990855
Energy at 298.15K-407.989887
HF Energy-407.036373
Nuclear repulsion energy324.724434
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 CISD/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 2553 2363 0.00      
2 A1 615 570 0.00      
3 E 617 571 0.00      
3 E 617 571 0.00      
4 E 121 112 0.00      
4 E 121 112 0.00      
5 T1 371 344 0.00      
5 T1 371 344 0.00      
5 T1 371 344 0.00      
6 T2 2544 2356 4.50      
6 T2 2544 2356 4.50      
6 T2 2544 2356 4.50      
7 T2 1175 1088 44.87      
7 T2 1175 1088 44.87      
7 T2 1175 1088 44.87      
8 T2 596 552 0.53      
8 T2 596 552 0.53      
8 T2 596 552 0.53      
9 T2 159 147 15.78      
9 T2 159 147 15.78      
9 T2 159 147 15.78      

Unscaled Zero Point Vibrational Energy (zpe) 9589.5 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 8878.0 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 CISD/6-31G*
ABC
0.05151 0.05151 0.05151

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

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.854 0.854 0.854
C3 -0.854 -0.854 0.854
C4 -0.854 0.854 -0.854
C5 0.854 -0.854 -0.854
N6 1.515 1.515 1.515
N7 -1.515 -1.515 1.515
N8 -1.515 1.515 -1.515
N9 1.515 -1.515 -1.515

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.47981.47981.47981.47982.62442.62442.62442.6244
C21.47982.41652.41652.41651.14463.41563.41563.4156
C31.47982.41652.41652.41653.41561.14463.41563.4156
C41.47982.41652.41652.41653.41563.41561.14463.4156
C51.47982.41652.41652.41653.41563.41563.41561.1446
N62.62441.14463.41563.41563.41564.28574.28574.2857
N72.62443.41561.14463.41563.41564.28574.28574.2857
N82.62443.41563.41561.14463.41564.28574.28574.2857
N92.62443.41563.41563.41561.14464.28574.28574.2857

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