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return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for (tetracyanomethane)

using model chemistry: MP2/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-408.670352
Energy at 298.15K-408.668954
HF Energy-407.161939
Nuclear repulsion energy322.136230
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/Def2TZVPP
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 2175 2069 0.00      
2 A1 588 560 0.00      
3 E 560 533 0.00      
3 E 560 533 0.00      
4 E 109 104 0.00      
4 E 109 104 0.00      
5 T1 330 314 0.00      
5 T1 330 314 0.00      
5 T1 330 314 0.00      
6 T2 2181 2075 28.23      
6 T2 2181 2075 28.23      
6 T2 2181 2075 28.23      
7 T2 1084 1031 25.89      
7 T2 1084 1031 25.89      
7 T2 1084 1031 25.89      
8 T2 546 520 0.00      
8 T2 546 520 0.00      
8 T2 546 520 0.00      
9 T2 141 135 13.32      
9 T2 141 135 13.32      
9 T2 141 135 13.32      

Unscaled Zero Point Vibrational Energy (zpe) 8474.1 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 8063.1 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 MP2/Def2TZVPP
ABC
0.05085 0.05085 0.05085

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.852 0.852 0.852
C3 -0.852 -0.852 0.852
C4 -0.852 0.852 -0.852
C5 0.852 -0.852 -0.852
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
C11.47511.47511.47511.47512.63792.63792.63792.6379
C21.47512.40892.40892.40891.16273.42473.42473.4247
C31.47512.40892.40892.40893.42471.16273.42473.4247
C41.47512.40892.40892.40893.42473.42471.16273.4247
C51.47512.40892.40892.40893.42473.42473.42471.1627
N62.63791.16273.42473.42473.42474.30764.30764.3076
N72.63793.42471.16273.42473.42474.30764.30764.3076
N82.63793.42473.42471.16273.42474.30764.30764.3076
N92.63793.42473.42473.42471.16274.30764.30764.3076

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