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

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-408.296220
Energy at 298.15K-408.294755
HF Energy-407.011151
Nuclear repulsion energy320.255360
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 MP2/6-31G*
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 2179 2055 0.00      
2 A1 589 555 0.00      
3 E 554 522 0.00      
3 E 554 522 0.00      
4 E 108 102 0.00      
4 E 108 102 0.00      
5 T1 325 307 0.00      
5 T1 325 307 0.00      
5 T1 325 307 0.00      
6 T2 2186 2061 30.19      
6 T2 2186 2061 30.19      
6 T2 2186 2061 30.19      
7 T2 1096 1034 28.76      
7 T2 1096 1034 28.76      
7 T2 1096 1034 28.76      
8 T2 547 516 0.06      
8 T2 547 516 0.06      
8 T2 547 516 0.06      
9 T2 141 133 12.40      
9 T2 141 133 12.40      
9 T2 141 133 12.40      

Unscaled Zero Point Vibrational Energy (zpe) 8487.1 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 8003.4 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 MP2/6-31G*
ABC
0.05029 0.05029 0.05029

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.855 0.855 0.855
C3 -0.855 -0.855 0.855
C4 -0.855 0.855 -0.855
C5 0.855 -0.855 -0.855
N6 1.532 1.532 1.532
N7 -1.532 -1.532 1.532
N8 -1.532 1.532 -1.532
N9 1.532 -1.532 -1.532

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.48011.48011.48011.48012.65352.65352.65352.6535
C21.48012.41702.41702.41701.17343.44243.44243.4424
C31.48012.41702.41702.41703.44241.17343.44243.4424
C41.48012.41702.41702.41703.44243.44241.17343.4424
C51.48012.41702.41702.41703.44243.44243.44241.1734
N62.65351.17343.44243.44243.44244.33324.33324.3332
N72.65353.44241.17343.44243.44244.33324.33324.3332
N82.65353.44243.44241.17343.44244.33324.33324.3332
N92.65353.44243.44243.44241.17344.33324.33324.3332

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