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

using model chemistry: PBEPBE/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 PBEPBE/3-21G
 hartrees
Energy at 0K-406.682582
Energy at 298.15K-406.681810
HF Energy-406.682582
Nuclear repulsion energy320.402637
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 PBEPBE/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 2277 2257 0.00      
2 A1 579 574 0.00      
3 E 632 627 0.00      
3 E 632 627 0.00      
4 E 130 128 0.00      
4 E 130 128 0.00      
5 T1 433 429 0.00      
5 T1 433 429 0.00      
5 T1 433 429 0.00      
6 T2 2267 2247 10.37      
6 T2 2267 2247 10.37      
6 T2 2267 2247 10.37      
7 T2 1028 1019 28.12      
7 T2 1028 1019 28.12      
7 T2 1028 1019 28.12      
8 T2 579 574 0.61      
8 T2 579 574 0.61      
8 T2 579 574 0.61      
9 T2 167 166 7.49      
9 T2 167 166 7.49      
9 T2 167 166 7.49      

Unscaled Zero Point Vibrational Energy (zpe) 8902.9 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 8821.9 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 PBEPBE/3-21G
ABC
0.05029 0.05029 0.05029

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

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
C2 0.858 0.858 0.858
C3 -0.858 -0.858 0.858
C4 -0.858 0.858 -0.858
C5 0.858 -0.858 -0.858
N6 1.537 1.537 1.537
N7 -1.537 -1.537 1.537
N8 -1.537 1.537 -1.537
N9 1.537 -1.537 -1.537

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 N6 N7 N8 N9
C11.48571.48571.48571.48572.66182.66182.66182.6618
C21.48572.42622.42622.42621.17613.45393.45393.4539
C31.48572.42622.42622.42623.45391.17613.45393.4539
C41.48572.42622.42622.42623.45393.45391.17613.4539
C51.48572.42622.42622.42623.45393.45393.45391.1761
N62.66181.17613.45393.45393.45394.34674.34674.3467
N72.66183.45391.17613.45393.45394.34674.34674.3467
N82.66183.45393.45391.17613.45394.34674.34674.3467
N92.66183.45393.45393.45391.17614.34674.34674.3467

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 PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.607      
2 C 0.547      
3 C 0.547      
4 C 0.547      
5 C 0.547      
6 N -0.396      
7 N -0.396      
8 N -0.396      
9 N -0.396      


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 -55.984 0.000 0.000
y 0.000 -55.984 0.000
z 0.000 0.000 -55.984
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 7.991 0.000 0.000
y 0.000 7.991 0.000
z 0.000 0.000 7.991


<r2> (average value of r2) Å2
<r2> 286.331
(<r2>)1/2 16.921