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All results from a given calculation for HCN (Hydrogen cyanide)

using model chemistry: LSDA/STO-3G

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 LSDA/STO-3G
 hartrees
Energy at 0K-91.667202
Energy at 298.15K-91.667274
HF Energy-91.667202
Nuclear repulsion energy23.046665
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 LSDA/STO-3G
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 3573 3200 126.76      
2 Σ 2155 1930 0.85      
3 Π 775 694 30.31      
3 Π 775 694 30.31      

Unscaled Zero Point Vibrational Energy (zpe) 3638.2 cm-1
Scaled (by 0.8955) Zero Point Vibrational Energy (zpe) 3258.1 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 LSDA/STO-3G
B
1.37781

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/STO-3G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.522
H2 0.000 0.000 -1.614
N3 0.000 0.000 0.678

Atom - Atom Distances (Å)
  C1 H2 N3
C11.09221.1999
H21.09222.2921
N31.19992.2921

picture of Hydrogen cyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 N3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.019      
2 H 0.166      
3 N -0.147      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.302 2.302
CHELPG        
AIM        
ESP        


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 0.445 0.000 0.000
y 0.000 0.445 0.000
z 0.000 0.000 1.824


<r2> (average value of r2) Å2
<r2> 13.744
(<r2>)1/2 3.707