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

using model chemistry: CISD/3-21G*

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/3-21G*
 hartrees
Energy at 0K-405.465813
Energy at 298.15K-405.465388
HF Energy-404.763482
Nuclear repulsion energy323.885297
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/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 2491 2327 0.00      
2 A1 609 569 0.00      
3 E 678 634 0.00      
3 E 678 634 0.00      
4 E 142 133 0.00      
4 E 142 133 0.00      
5 T1 456 426 0.00      
5 T1 456 426 0.00      
5 T1 456 426 0.00      
6 T2 2479 2316 6.20      
6 T2 2479 2316 6.20      
6 T2 2479 2316 6.20      
7 T2 1132 1058 43.92      
7 T2 1132 1058 43.92      
7 T2 1132 1058 43.92      
8 T2 626 585 0.01      
8 T2 626 585 0.01      
8 T2 626 585 0.01      
9 T2 183 171 11.36      
9 T2 183 171 11.36      
9 T2 183 171 11.36      

Unscaled Zero Point Vibrational Energy (zpe) 9683.7 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 9048.4 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/3-21G*
ABC
0.05129 0.05129 0.05129

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

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 1.519 1.519 1.519
N7 -1.519 -1.519 1.519
N8 -1.519 1.519 -1.519
N9 1.519 -1.519 -1.519

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.47951.47951.47951.47952.63182.63182.63182.6318
C21.47952.41602.41602.41601.15233.42213.42213.4221
C31.47952.41602.41602.41603.42211.15233.42213.4221
C41.47952.41602.41602.41603.42213.42211.15233.4221
C51.47952.41602.41602.41603.42213.42213.42211.1523
N62.63181.15233.42213.42213.42214.29774.29774.2977
N72.63183.42211.15233.42213.42214.29774.29774.2977
N82.63183.42213.42211.15233.42214.29774.29774.2977
N92.63183.42213.42213.42211.15234.29774.29774.2977

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