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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-169.363385
Energy at 298.15K-169.362704
HF Energy-169.363385
Nuclear repulsion energy76.830028
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 PBE1PBE/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 3508 3333 78.39      
2 Σ 2421 2300 29.79      
3 Σ 2208 2098 1.47      
4 Σ 920 875 0.00      
5 Π 674 640 49.71      
5 Π 674 640 49.71      
6 Π 575 546 1.78      
6 Π 575 546 1.78      
7 Π 256 244 0.47      
7 Π 256 244 0.47      

Unscaled Zero Point Vibrational Energy (zpe) 6033.3 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 5733.5 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 PBE1PBE/6-31G*
B
0.15169

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.903
C2 0.000 0.000 0.739
C3 0.000 0.000 -0.633
C4 0.000 0.000 -1.841
H5 0.000 0.000 -2.910

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.16412.53593.74454.8131
C21.16411.37182.58033.6489
C32.53591.37181.20862.2772
C43.74452.58031.20861.0686
H54.81313.64892.27721.0686

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