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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: HF/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-168.614419
Energy at 298.15K-168.613957
HF Energy-168.614419
Nuclear repulsion energy77.949897
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/Def2TZVPP
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 3612 3274 76.67      
2 Σ 2632 2386 46.05      
3 Σ 2365 2143 1.58      
4 Σ 927 840 0.00      
5 Π 854 774 40.58      
5 Π 854 774 40.58      
6 Π 606 550 15.02      
6 Π 606 550 15.02      
7 Π 265 240 0.10      
7 Π 265 240 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 6493.1 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 5885.3 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 HF/Def2TZVPP
B
0.15498

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.876
C2 0.000 0.000 0.748
C3 0.000 0.000 -0.640
C4 0.000 0.000 -1.818
H5 0.000 0.000 -2.873

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.12752.51553.69424.7491
C21.12751.38802.56673.6216
C32.51551.38801.17872.2336
C43.69422.56671.17871.0549
H54.74913.62162.23361.0549

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/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.101      
2 C -0.312      
3 C 0.059      
4 C 0.148      
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 -4.071 4.071
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.994 0.000 0.000
y 0.000 -22.994 0.000
z 0.000 0.000 -21.000
Traceless
 xyz
x -0.997 0.000 0.000
y 0.000 -0.997 0.000
z 0.000 0.000 1.994
Polar
3z2-r23.988
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 3.068 0.000 0.000
y 0.000 3.068 0.000
z 0.000 0.000 9.209


<r2> (average value of r2) Å2
<r2> 72.507
(<r2>)1/2 8.515