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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: HF/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-168.568210
Energy at 298.15K-168.567671
Nuclear repulsion energy77.387587
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/aug-cc-pVDZ
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 3624 3300 81.57      
2 Σ 2633 2397 49.97      
3 Σ 2361 2150 1.04      
4 Σ 932 848 0.00      
5 Π 803 731 42.99      
5 Π 803 731 42.99      
6 Π 587 535 10.69      
6 Π 587 535 10.69      
7 Π 252 230 0.09      
7 Π 252 230 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 6416.5 cm-1
Scaled (by 0.9106) Zero Point Vibrational Energy (zpe) 5842.8 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/aug-cc-pVDZ
B
0.15288

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/aug-cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.889
C2 0.000 0.000 0.752
C3 0.000 0.000 -0.642
C4 0.000 0.000 -1.832
H5 0.000 0.000 -2.895

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.13692.53093.72124.7840
C21.13691.39402.58423.6470
C32.53091.39401.19032.2531
C43.72122.58421.19031.0628
H54.78403.64702.25311.0628

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/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.377      
2 C -0.348      
3 C 0.633      
4 C 0.571      
5 H -0.479      


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 -4.105 4.105
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.207 0.000 0.000
y 0.000 -23.207 0.000
z 0.000 0.000 -21.037
Traceless
 xyz
x -1.085 0.000 0.000
y 0.000 -1.085 0.000
z 0.000 0.000 2.170
Polar
3z2-r24.339
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 3.670 0.000 0.000
y 0.000 3.670 0.000
z 0.000 0.000 9.526


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