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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: HSEh1PBE/cc-pVTZ

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 HSEh1PBE/cc-pVTZ
 hartrees
Energy at 0K-169.439185
Energy at 298.15K-169.438500
HF Energy-169.439185
Nuclear repulsion energy77.299906
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 HSEh1PBE/cc-pVTZ
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 3476 3340 85.91      
2 Σ 2401 2308 23.05      
3 Σ 2192 2106 0.82      
4 Σ 912 877 0.00      
5 Π 716 689 40.42      
5 Π 716 689 40.42      
6 Π 551 530 6.66      
6 Π 551 530 6.66      
7 Π 242 233 0.14      
7 Π 242 233 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 5999.2 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 5765.8 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 HSEh1PBE/cc-pVTZ
B
0.15344

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.891
C2 0.000 0.000 0.739
C3 0.000 0.000 -0.631
C4 0.000 0.000 -1.831
H5 0.000 0.000 -2.895

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.15162.52223.72194.7862
C21.15161.37072.57033.6346
C32.52221.37071.19962.2640
C43.72192.57031.19961.0643
H54.78623.63462.26401.0643

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 HSEh1PBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.099      
2 C 0.028      
3 C 0.224      
4 C -0.312      
5 H 0.159      


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 -3.831 3.831
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.625 0.000 0.000
y 0.000 -22.625 0.000
z 0.000 0.000 -20.583
Traceless
 xyz
x -1.021 0.000 0.000
y 0.000 -1.021 0.000
z 0.000 0.000 2.043
Polar
3z2-r24.085
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 3.001 0.000 0.000
y 0.000 3.001 0.000
z 0.000 0.000 9.932


<r2> (average value of r2) Å2
<r2> 72.873
(<r2>)1/2 8.537