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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-405.687408
Energy at 298.15K-405.686600
HF Energy-404.736499
Nuclear repulsion energy318.374915
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 MP2/3-21G*
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 2112 2009 0.00      
2 A1 573 545 0.00      
3 E 625 594 0.00      
3 E 625 594 0.00      
4 E 132 126 0.00      
4 E 132 126 0.00      
5 T1 419 399 0.00      
5 T1 419 399 0.00      
5 T1 419 399 0.00      
6 T2 2114 2011 31.27      
6 T2 2114 2011 31.27      
6 T2 2114 2011 31.27      
7 T2 1043 992 26.23      
7 T2 1043 992 26.23      
7 T2 1043 992 26.23      
8 T2 580 551 0.47      
8 T2 580 551 0.47      
8 T2 580 551 0.47      
9 T2 171 163 9.14      
9 T2 171 163 9.14      
9 T2 171 163 9.14      

Unscaled Zero Point Vibrational Energy (zpe) 8589.8 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 8171.4 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 MP2/3-21G*
ABC
0.04971 0.04971 0.04971

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

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 1.547 1.547 1.547
N7 -1.547 -1.547 1.547
N8 -1.547 1.547 -1.547
N9 1.547 -1.547 -1.547

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.48901.48901.48901.48902.67982.67982.67982.6798
C21.48902.43152.43152.43151.19083.47253.47253.4725
C31.48902.43152.43152.43153.47251.19083.47253.4725
C41.48902.43152.43152.43153.47253.47251.19083.4725
C51.48902.43152.43152.43153.47253.47253.47251.1908
N62.67981.19083.47253.47253.47254.37614.37614.3761
N72.67983.47251.19083.47253.47254.37614.37614.3761
N82.67983.47253.47251.19083.47254.37614.37614.3761
N92.67983.47253.47253.47251.19084.37614.37614.3761

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