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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: TPSSh/6-31G(2df,p)

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 TPSSh/6-31G(2df,p)
 hartrees
Energy at 0K-169.593020
Energy at 298.15K-169.592295
HF Energy-169.593020
Nuclear repulsion energy76.939018
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 TPSSh/6-31G(2df,p)
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 3497 3374 82.03      
2 Σ 2353 2270 24.18      
3 Σ 2161 2086 0.75      
4 Σ 905 874 0.00      
5 Π 681 657 40.44      
6 Π 681 657 40.44      
7 Π 554 535 2.71      
8 Π 554 535 2.71      
9 Π 242 234 0.41      
10 Π 242 234 0.41      

Unscaled Zero Point Vibrational Energy (zpe) 5935.2 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 5727.5 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 TPSSh/6-31G(2df,p)
B
0.15221

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.899
C2 0.000 0.000 0.739
C3 0.000 0.000 -0.633
C4 0.000 0.000 -1.839
H5 0.000 0.000 -2.902

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.16042.53203.73824.8020
C21.16041.37162.57773.6415
C32.53201.37161.20612.2699
C43.73822.57771.20611.0638
H54.80203.64152.26991.0638

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