return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HF/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 HF/6-31G**
 hartrees
Energy at 0K-407.038415
Energy at 298.15K-407.037674
HF Energy-407.038415
Nuclear repulsion energy325.701709
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 HF/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 2654 2396 0.00      
2 A1 620 560 0.00      
3 E 645 583 0.00      
3 E 645 583 0.00      
4 E 127 115 0.00      
4 E 127 115 0.00      
5 T1 394 355 0.00      
5 T1 394 355 0.00      
5 T1 394 355 0.00      
6 T2 2648 2391 1.14      
6 T2 2648 2391 1.14      
6 T2 2648 2391 1.14      
7 T2 1195 1078 56.22      
7 T2 1195 1078 56.22      
7 T2 1195 1078 56.22      
8 T2 616 556 1.43      
8 T2 616 556 1.43      
8 T2 616 556 1.43      
9 T2 167 151 17.53      
9 T2 167 151 17.53      
9 T2 167 151 17.53      

Unscaled Zero Point Vibrational Energy (zpe) 9939.1 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 8971.0 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 HF/6-31G**
ABC
0.05172 0.05172 0.05172

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

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.857 0.857 0.857
C3 -0.857 -0.857 0.857
C4 -0.857 0.857 -0.857
C5 0.857 -0.857 -0.857
N6 1.510 1.510 1.510
N7 -1.510 -1.510 1.510
N8 -1.510 1.510 -1.510
N9 1.510 -1.510 -1.510

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.48431.48431.48431.48432.61552.61552.61552.6155
C21.48432.42392.42392.42391.13123.41063.41063.4106
C31.48432.42392.42392.42393.41061.13123.41063.4106
C41.48432.42392.42392.42393.41063.41061.13123.4106
C51.48432.42392.42392.42393.41063.41063.41061.1312
N62.61551.13123.41063.41063.41064.27114.27114.2711
N72.61553.41061.13123.41063.41064.27114.27114.2711
N82.61553.41063.41061.13123.41064.27114.27114.2711
N92.61553.41063.41063.41061.13124.27114.27114.2711

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
Charges from optimized geometry at HF/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.100      
2 C 0.383      
3 C 0.383      
4 C 0.383      
5 C 0.383      
6 N -0.358      
7 N -0.358      
8 N -0.358      
9 N -0.358      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -57.750 0.000 0.000
y 0.000 -57.750 0.000
z 0.000 0.000 -57.750
Traceless
 xyz
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000
Polar
3z2-r20.000
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.047 0.000 0.000
y 0.000 8.047 0.000
z 0.000 0.000 8.047


<r2> (average value of r2) Å2
<r2> 280.489
(<r2>)1/2 16.748