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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: CCD/6-31+G**

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 CCD/6-31+G**
 hartrees
Energy at 0K-169.096025
Energy at 298.15K-169.095162
HF Energy-168.553233
Nuclear repulsion energy76.342803
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 CCD/6-31+G**
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 3520 3317 70.47      
2 Σ 2408 2269 13.85      
3 Σ 2182 2056 1.42      
4 Σ 891 840 0.20      
5 Π 655 617 57.90      
5 Π 655 617 57.90      
6 Π 488 460 0.00      
6 Π 488 460 0.00      
7 Π 239 225 0.36      
7 Π 239 225 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 5881.6 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 5542.3 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 CCD/6-31+G**
B
0.14942

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.916
C2 0.000 0.000 0.748
C3 0.000 0.000 -0.643
C4 0.000 0.000 -1.855
H5 0.000 0.000 -2.920

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.16802.55943.77124.8364
C21.16801.39142.60323.6683
C32.55941.39141.21182.2769
C43.77122.60321.21181.0652
H54.83643.66832.27691.0652

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 CCD/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.417      
2 C -1.024      
3 C 0.403      
4 C 0.703      
5 H 0.335      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


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


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