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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: MP2/6-311G*

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 MP2/6-311G*
 hartrees
Energy at 0K-169.136714
Energy at 298.15K-169.135769
HF Energy-168.576484
Nuclear repulsion energy76.179948
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 MP2/6-311G*
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 3481 3308 74.17      
2 Σ 2231 2120 6.10      
3 Σ 2028 1927 5.44      
4 Σ 881 837 0.24      
5 Π 599 569 44.17      
5 Π 599 569 44.17      
6 Π 504 479 1.06      
6 Π 504 479 1.06      
7 Π 223 212 0.48      
7 Π 223 212 0.48      

Unscaled Zero Point Vibrational Energy (zpe) 5636.5 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 5356.4 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 MP2/6-311G*
B
0.14931

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.914
C2 0.000 0.000 0.744
C3 0.000 0.000 -0.636
C4 0.000 0.000 -1.854
H5 0.000 0.000 -2.920

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.16962.55053.76834.8341
C21.16961.38082.59873.6644
C32.55051.38081.21782.2836
C43.76832.59871.21781.0658
H54.83413.66442.28361.0658

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