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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: B3PW91/6-311G*

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 B3PW91/6-311G*
 hartrees
Energy at 0K-169.537111
Energy at 298.15K-169.536374
Nuclear repulsion energy77.133386
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 B3PW91/6-311G*
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 3470 3340 67.21      
2 Σ 2389 2300 24.87      
3 Σ 2177 2095 0.90      
4 Σ 911 877 0.00      
5 Π 671 646 43.65      
5 Π 671 646 43.65      
6 Π 557 537 3.87      
6 Π 557 537 3.87      
7 Π 240 231 0.12      
7 Π 240 231 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 5941.9 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 5720.3 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 B3PW91/6-311G*
B
0.15287

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.895
C2 0.000 0.000 0.737
C3 0.000 0.000 -0.630
C4 0.000 0.000 -1.834
H5 0.000 0.000 -2.901

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.15822.52533.72964.7957
C21.15821.36712.57153.6375
C32.52531.36711.20432.2704
C43.72962.57151.20431.0661
H54.79573.63752.27041.0661

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 B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.232      
2 C -0.111      
3 C 0.197      
4 C -0.134      
5 H 0.281      


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 -3.849 3.849
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.565 0.000 0.000
y 0.000 -22.565 0.000
z 0.000 0.000 -20.293
Traceless
 xyz
x -1.136 0.000 0.000
y 0.000 -1.136 0.000
z 0.000 0.000 2.272
Polar
3z2-r24.543
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 2.337 0.000 0.000
y 0.000 2.337 0.000
z 0.000 0.000 9.714


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