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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: M06-2X/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 M06-2X/6-31G*
 hartrees
Energy at 0K-169.502382
Energy at 298.15K-169.501758
HF Energy-169.502382
Nuclear repulsion energy76.799602
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 M06-2X/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 3487 3302 81.82      
2 Σ 2466 2336 30.23      
3 Σ 2241 2123 2.46      
4 Σ 914 865 0.00      
5 Π 720 682 45.22      
5 Π 720 682 45.22      
6 Π 584 553 4.09      
6 Π 584 553 4.09      
7 Π 258 244 0.39      
7 Π 258 244 0.39      

Unscaled Zero Point Vibrational Energy (zpe) 6116.3 cm-1
Scaled (by 0.947) Zero Point Vibrational Energy (zpe) 5792.1 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 M06-2X/6-31G*
B
0.15121

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.905
C2 0.000 0.000 0.747
C3 0.000 0.000 -0.640
C4 0.000 0.000 -1.845
H5 0.000 0.000 -2.914

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.15742.54453.74974.8187
C21.15741.38702.59233.6613
C32.54451.38701.20532.2743
C43.74972.59231.20531.0690
H54.81873.66132.27431.0690

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 M06-2X/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.457      
2 C 0.167      
3 C 0.616      
4 C -0.602      
5 H 0.277      


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 -3.811 3.811
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.251 0.000 0.000
y 0.000 -22.251 0.000
z 0.000 0.000 -19.995
Traceless
 xyz
x -1.128 0.000 0.000
y 0.000 -1.128 0.000
z 0.000 0.000 2.256
Polar
3z2-r24.512
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 1.988 0.000 0.000
y 0.000 1.988 0.000
z 0.000 0.000 9.183


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