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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: HF/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-168.491214
Energy at 298.15K-168.490836
Nuclear repulsion energy77.044951
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/LANL2DZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3677 3308 76.11      
2 Σ 2601 2341 64.12      
3 Σ 2323 2090 0.53      
4 Σ 939 845 0.08      
5 Π 882 794 51.66      
5 Π 882 794 51.66      
6 Π 645 580 14.93      
6 Π 645 580 14.93      
7 Π 280 252 0.15      
7 Π 280 252 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 6576.8 cm-1
Scaled (by 0.8999) Zero Point Vibrational Energy (zpe) 5918.5 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/LANL2DZ
B
0.15195

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/LANL2DZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.899
C2 0.000 0.000 0.746
C3 0.000 0.000 -0.640
C4 0.000 0.000 -1.839
H5 0.000 0.000 -2.894

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.15332.53943.73784.7926
C21.15331.38612.58453.6393
C32.53941.38611.19842.2532
C43.73782.58451.19841.0548
H54.79263.63932.25321.0548

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/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.069      
2 C -0.015      
3 C 0.062      
4 C -0.261      
5 H 0.284      


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 -4.134 4.134
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.239 0.000 0.000
y 0.000 -23.239 0.000
z 0.000 0.000 -21.865
Traceless
 xyz
x -0.687 0.000 0.000
y 0.000 -0.687 0.000
z 0.000 0.000 1.374
Polar
3z2-r22.747
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 1.942 0.000 0.000
y 0.000 1.942 0.000
z 0.000 0.000 9.233


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