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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: MP3/6-31+G**

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 MP3/6-31+G**
 hartrees
Energy at 0K-169.082971
Energy at 298.15K 
HF Energy-168.548590
Nuclear repulsion energy76.612675
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 MP3/6-31+G**
Rotational Constants (cm-1) from geometry optimized at MP3/6-31+G**
B
0.15043

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.911
C2 0.000 0.000 0.749
C3 0.000 0.000 -0.642
C4 0.000 0.000 -1.851
H5 0.000 0.000 -2.913

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.16142.55253.76154.8240
C21.16141.39112.60013.6626
C32.55251.39111.20902.2715
C43.76152.60011.20901.0625
H54.82403.66262.27151.0625

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