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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: BLYP/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 BLYP/6-31G*
 hartrees
Energy at 0K-169.530257
Energy at 298.15K-169.529426
HF Energy-169.530257
Nuclear repulsion energy76.196811
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 BLYP/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 3411 3384 73.74      
2 Σ 2275 2257 21.27      
3 Σ 2099 2082 0.38      
4 Σ 893 885 0.00      
5 Π 595 590 37.56      
5 Π 595 590 37.56      
6 Π 536 532 7.98      
6 Π 536 532 7.98      
7 Π 254 252 0.76      
7 Π 254 252 0.76      

Unscaled Zero Point Vibrational Energy (zpe) 5724.1 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 5677.8 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 BLYP/6-31G*
B
0.14949

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.917
C2 0.000 0.000 0.744
C3 0.000 0.000 -0.636
C4 0.000 0.000 -1.856
H5 0.000 0.000 -2.929

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.17312.55253.77244.8458
C21.17311.37942.59933.6727
C32.55251.37941.21992.2933
C43.77242.59931.21991.0734
H54.84583.67272.29331.0734

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 BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.478      
2 C 0.057      
3 C 0.772      
4 C -0.557      
5 H 0.206      


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 -3.746 3.746
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.043 0.000 0.000
y 0.000 -22.043 0.000
z 0.000 0.000 -20.378
Traceless
 xyz
x -0.833 0.000 0.000
y 0.000 -0.833 0.000
z 0.000 0.000 1.665
Polar
3z2-r23.331
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 2.019 0.000 0.000
y 0.000 2.019 0.000
z 0.000 0.000 9.925


<r2> (average value of r2) Å2
<r2> 74.137
(<r2>)1/2 8.610