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

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-67.338604
Energy at 298.15K-67.337025
HF Energy-66.042672
Nuclear repulsion energy149.783146
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 MP2/CEP-121G*
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 2110 2011 0.00      
2 A1 577 550 0.00      
3 E 549 523 0.00      
3 E 549 523 0.00      
4 E 105 100 0.00      
4 E 105 100 0.00      
5 T1 311 296 0.00      
5 T1 311 296 0.00      
5 T1 311 296 0.00      
6 T2 2121 2021 35.77      
6 T2 2121 2021 35.77      
6 T2 2121 2021 35.77      
7 T2 1080 1029 36.95      
7 T2 1080 1029 36.95      
7 T2 1080 1029 36.95      
8 T2 534 509 0.66      
8 T2 534 509 0.66      
8 T2 534 509 0.66      
9 T2 134 128 10.88      
9 T2 134 128 10.88      
9 T2 134 128 10.88      

Unscaled Zero Point Vibrational Energy (zpe) 8267.6 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 7877.4 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 MP2/CEP-121G*
ABC
0.04975 0.04975 0.04975

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.860 0.860 0.860
C3 -0.860 -0.860 0.860
C4 -0.860 0.860 -0.860
C5 0.860 -0.860 -0.860
N6 1.546 1.546 1.546
N7 -1.546 -1.546 1.546
N8 -1.546 1.546 -1.546
N9 1.546 -1.546 -1.546

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.48991.48991.48991.48992.67812.67812.67812.6781
C21.48992.43302.43302.43301.18813.47163.47163.4716
C31.48992.43302.43302.43303.47161.18813.47163.4716
C41.48992.43302.43302.43303.47163.47161.18813.4716
C51.48992.43302.43302.43303.47163.47163.47161.1881
N62.67811.18813.47163.47163.47164.37324.37324.3732
N72.67813.47161.18813.47163.47164.37324.37324.3732
N82.67813.47163.47161.18813.47164.37324.37324.3732
N92.67813.47163.47163.47161.18814.37324.37324.3732

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