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

using model chemistry: QCISD/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-408.650502
Energy at 298.15K-408.649256
HF Energy-407.161129
Nuclear repulsion energy323.065435
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/cc-pVTZ
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 2361 2256 0.00      
2 A1 587 561 0.00      
3 E 578 552 0.00      
3 E 578 552 0.00      
4 E 113 108 0.00      
4 E 113 108 0.00      
5 T1 338 323 0.00      
5 T1 338 323 0.00      
5 T1 338 323 0.00      
6 T2 2356 2252 11.18      
6 T2 2356 2252 11.18      
6 T2 2356 2252 11.18      
7 T2 1102 1053 31.51      
7 T2 1102 1053 31.51      
7 T2 1102 1053 31.51      
8 T2 561 536 0.07      
8 T2 561 536 0.07      
8 T2 561 536 0.07      
9 T2 148 141 14.07      
9 T2 148 141 14.07      
9 T2 148 141 14.07      

Unscaled Zero Point Vibrational Energy (zpe) 8923.2 cm-1
Scaled (by 0.9555) Zero Point Vibrational Energy (zpe) 8526.1 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/cc-pVTZ
ABC
0.05102 0.05102 0.05102

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVTZ

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 1.523 1.523 1.523
N7 -1.523 -1.523 1.523
N8 -1.523 1.523 -1.523
N9 1.523 -1.523 -1.523

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.48401.48401.48401.48402.63832.63832.63832.6383
C21.48402.42342.42342.42341.15433.43133.43133.4313
C31.48402.42342.42342.42343.43131.15433.43133.4313
C41.48402.42342.42342.42343.43133.43131.15433.4313
C51.48402.42342.42342.42343.43133.43133.43131.1543
N62.63831.15433.43133.43133.43134.30844.30844.3084
N72.63833.43131.15433.43133.43134.30844.30844.3084
N82.63833.43133.43131.15433.43134.30844.30844.3084
N92.63833.43133.43133.43131.15434.30844.30844.3084

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