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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: HF/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at HF/6-311G*
 hartrees
Energy at 0K-168.586053
Energy at 298.15K-168.585575
Nuclear repulsion energy77.834257
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/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 3633 3285 60.80      
2 Σ 2642 2389 46.97      
3 Σ 2364 2138 2.79      
4 Σ 930 841 0.01      
5 Π 826 747 39.68      
5 Π 826 747 39.68      
6 Π 611 553 12.39      
6 Π 611 553 12.39      
7 Π 265 240 0.05      
7 Π 265 240 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 6486.4 cm-1
Scaled (by 0.9044) Zero Point Vibrational Energy (zpe) 5866.3 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/6-311G*
B
0.15459

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.879
C2 0.000 0.000 0.749
C3 0.000 0.000 -0.639
C4 0.000 0.000 -1.821
H5 0.000 0.000 -2.878

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.13002.51813.70014.7564
C21.13001.38812.57013.6263
C32.51811.38811.18202.2383
C43.70012.57011.18201.0563
H54.75643.62632.23831.0563

picture of Cyanoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 180.000 C2 C3 C4 180.000
C3 C4 H5 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.297      
2 C -0.070      
3 C 0.131      
4 C -0.080      
5 H 0.316      


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 -4.054 4.054
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.951 0.000 0.000
y 0.000 -22.951 0.000
z 0.000 0.000 -20.725
Traceless
 xyz
x -1.113 0.000 0.000
y 0.000 -1.113 0.000
z 0.000 0.000 2.226
Polar
3z2-r24.452
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 2.282 0.000 0.000
y 0.000 2.282 0.000
z 0.000 0.000 8.843


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000