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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: CID/6-31G*

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 CID/6-31G*
 hartrees
Energy at 0K-169.010685
Energy at 298.15K-169.009984
HF Energy-168.547969
Nuclear repulsion energy76.936535
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 CID/6-31G*
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 3579 3306 69.43      
2 Σ 2520 2327 29.05      
3 Σ 2280 2106 3.16      
4 Σ 919 849 0.04      
5 Π 694 641 51.99      
5 Π 694 641 51.99      
6 Π 549 507 1.00      
6 Π 549 507 1.00      
7 Π 255 235 0.73      
7 Π 255 235 0.73      

Unscaled Zero Point Vibrational Energy (zpe) 6145.6 cm-1
Scaled (by 0.9237) Zero Point Vibrational Energy (zpe) 5676.7 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 CID/6-31G*
B
0.15161

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.902
C2 0.000 0.000 0.746
C3 0.000 0.000 -0.641
C4 0.000 0.000 -1.840
H5 0.000 0.000 -2.904

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.15552.54223.74144.8053
C21.15551.38672.58583.6498
C32.54221.38671.19922.2631
C43.74142.58581.19921.0639
H54.80533.64982.26311.0639

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 CID/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.443      
2 C 0.234      
3 C 0.297      
4 C -0.432      
5 H 0.344      


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> 73.569
(<r2>)1/2 8.577