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

using model chemistry: BLYP/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 BLYP/STO-3G
 hartrees
Energy at 0K-92.175003
Energy at 298.15K-92.175049
HF Energy-92.175003
Nuclear repulsion energy22.889025
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 BLYP/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 3493 3232 95.69 24.66 0.30 0.46
2 Σ 2085 1929 1.52 16.26 0.22 0.36
3 Π 745 689 28.77 0.10 0.75 0.86
3 Π 745 689 28.77 0.10 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3533.8 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 3269.4 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 BLYP/STO-3G
B
1.35896

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.526
H2 0.000 0.000 -1.623
N3 0.000 0.000 0.683

Atom - Atom Distances (Å)
  C1 H2 N3
C11.09711.2087
H21.09712.3058
N31.20872.3058

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 BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.002      
2 H 0.145      
3 N -0.148      


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 -2.233 2.233
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.459 0.000 0.000
y 0.000 -10.459 0.000
z 0.000 0.000 -9.434
Traceless
 xyz
x -0.513 0.000 0.000
y 0.000 -0.513 0.000
z 0.000 0.000 1.026
Polar
3z2-r22.051
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.454 0.000 0.000
y 0.000 0.454 0.000
z 0.000 0.000 1.884


<r2> (average value of r2) Å2
<r2> 13.876
(<r2>)1/2 3.725