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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G
 hartrees
Energy at 0K-168.874653
Energy at 298.15K-168.873166
HF Energy-168.467084
Nuclear repulsion energy75.158729
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/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 A' 3473 3300 57.56      
2 A' 2199 2089 9.28      
3 A' 1969 1870 2.55      
4 A' 857 815 0.61      
5 A' 607 577 55.94      
6 A' 278 264 0.57      
7 A' 171 162 1.15      
8 A" 593 563 54.94      
9 A" 212 201 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 5178.8 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 4920.4 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=FULL/6-31G
ABC
1810.78346 0.14552 0.14551

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.067 -1.948 0.000
C2 -0.021 -0.743 0.000
C3 0.000 0.646 0.000
C4 0.081 1.878 0.000
H5 0.107 2.949 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.20602.59463.82924.8998
C21.20601.38882.62323.6938
C32.59461.38881.23532.3054
C43.82922.62321.23531.0707
H54.89983.69382.30541.0707

picture of Cyanoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 178.637 C2 C3 C4 177.074
C3 C4 H5 177.574
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2=FULL/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.245      
2 C 0.192      
3 C -0.130      
4 C -0.224      
5 H 0.407      


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