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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: B3LYP/TZVP

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 B3LYP/TZVP
 hartrees
Energy at 0K-169.635096
Energy at 298.15K-169.634375
HF Energy-169.635096
Nuclear repulsion energy77.210144
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 B3LYP/TZVP
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 3469 3349 89.20      
2 Σ 2380 2297 26.30      
3 Σ 2181 2106 0.34      
4 Σ 907 875 0.00      
5 Π 699 675 42.77      
5 Π 699 675 42.77      
6 Π 543 525 7.05      
6 Π 543 525 7.05      
7 Π 240 231 0.06      
7 Π 240 231 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 5950.0 cm-1
Scaled (by 0.9654) Zero Point Vibrational Energy (zpe) 5744.1 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 B3LYP/TZVP
B
0.15311

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/TZVP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.893
C2 0.000 0.000 0.740
C3 0.000 0.000 -0.632
C4 0.000 0.000 -1.834
H5 0.000 0.000 -2.897

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.15342.52543.72694.7905
C21.15341.37202.57353.6371
C32.52541.37201.20152.2651
C43.72692.57351.20151.0636
H54.79053.63712.26511.0636

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