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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: MP2=FULL/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 MP2=FULL/cc-pVTZ
 hartrees
Energy at 0K-169.299627
Energy at 298.15K-169.298844
HF Energy-168.600868
Nuclear repulsion energy76.747369
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 MP2=FULL/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 3497 3320 83.69      
2 Σ 2251 2137 6.16      
3 Σ 2055 1951 3.64      
4 Σ 890 845 0.31      
5 Π 686 651 38.30      
6 Π 686 651 38.30      
7 Π 522 496 4.03      
8 Π 522 496 4.03      
9 Π 233 221 0.26      
10 Π 233 221 0.26      

Unscaled Zero Point Vibrational Energy (zpe) 5787.1 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 5494.3 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 MP2=FULL/cc-pVTZ
B
0.15157

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.901
C2 0.000 0.000 0.738
C3 0.000 0.000 -0.632
C4 0.000 0.000 -1.841
H5 0.000 0.000 -2.898

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.16342.53323.74254.7994
C21.16341.36982.57913.6360
C32.53321.36981.20932.2662
C43.74252.57911.20931.0569
H54.79943.63602.26621.0569

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