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

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-405.675397
Energy at 298.15K-405.674623
HF Energy-404.751168
Nuclear repulsion energy319.661509
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/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 2297 2208 0.00      
2 A1 575 552 0.00      
3 E 630 606 0.00      
3 E 630 606 0.00      
4 E 134 128 0.00      
4 E 134 128 0.00      
5 T1 419 402 0.00      
5 T1 419 402 0.00      
5 T1 419 402 0.00      
6 T2 2292 2203 14.09      
6 T2 2292 2203 14.09      
6 T2 2292 2203 14.09      
7 T2 1058 1017 32.80      
7 T2 1058 1017 32.80      
7 T2 1058 1017 32.80      
8 T2 585 562 0.18      
8 T2 585 562 0.18      
8 T2 585 562 0.18      
9 T2 173 166 9.62      
9 T2 173 166 9.62      
9 T2 173 166 9.62      

Unscaled Zero Point Vibrational Energy (zpe) 8988.1 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 8638.5 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/3-21G*
ABC
0.05001 0.05001 0.05001

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

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.863 0.863 0.863
C3 -0.863 -0.863 0.863
C4 -0.863 0.863 -0.863
C5 0.863 -0.863 -0.863
N6 1.540 1.540 1.540
N7 -1.540 -1.540 1.540
N8 -1.540 1.540 -1.540
N9 1.540 -1.540 -1.540

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.49401.49401.49401.49402.66732.66732.66732.6673
C21.49402.43972.43972.43971.17323.46453.46453.4645
C31.49402.43972.43972.43973.46451.17323.46453.4645
C41.49402.43972.43972.43973.46453.46451.17323.4645
C51.49402.43972.43972.43973.46453.46453.46451.1732
N62.66731.17323.46453.46453.46454.35564.35564.3556
N72.66733.46451.17323.46453.46454.35564.35564.3556
N82.66733.46453.46451.17323.46454.35564.35564.3556
N92.66733.46453.46453.46451.17324.35564.35564.3556

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