return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: CID/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 CID/6-31G
 hartrees
Energy at 0K-168.815826
Energy at 298.15K-168.814494
Nuclear repulsion energy76.274103
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 CID/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 3526 3298 58.70      
2 Σ 2450 2291 28.20      
3 Σ 2203 2060 0.42      
4 Σ 901 843 0.01      
5 Π 692 647 61.51      
5 Π 692 647 61.51      
6 Π 295 276 0.01      
6 Π 295 276 0.01      
7 Π 197 184 0.48      
7 Π 197 184 0.48      

Unscaled Zero Point Vibrational Energy (zpe) 5723.7 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 5352.8 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 CID/6-31G
B
0.14924

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.918
C2 0.000 0.000 0.747
C3 0.000 0.000 -0.643
C4 0.000 0.000 -1.856
H5 0.000 0.000 -2.923

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.17102.56103.77414.8410
C21.17101.39002.60303.6699
C32.56101.39001.21312.2800
C43.77412.60301.21311.0669
H54.84103.66992.28001.0669

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
Charges from optimized geometry at CID/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.207      
2 C 0.205      
3 C -0.127      
4 C -0.281      
5 H 0.410      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000