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

using model chemistry: PBEPBE/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 PBEPBE/6-31G
 hartrees
Energy at 0K-93.281138
Energy at 298.15K-93.281252
HF Energy-93.281138
Nuclear repulsion energy23.422938
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 PBEPBE/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 3415 3368 47.07 36.48 0.23 0.37
2 Σ 2071 2042 0.42 33.07 0.26 0.41
3 Π 750 739 57.81 0.08 0.75 0.86
3 Π 750 739 57.81 0.08 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3492.7 cm-1
Scaled (by 0.9862) Zero Point Vibrational Energy (zpe) 3444.5 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 PBEPBE/6-31G
B
1.42319

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.513
H2 0.000 0.000 -1.589
N3 0.000 0.000 0.667

Atom - Atom Distances (Å)
  C1 H2 N3
C11.07551.1804
H21.07552.2559
N31.18042.2559

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 PBEPBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.002      
2 H 0.256      
3 N -0.254      


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 -2.836 2.836
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.447 0.000 0.000
y 0.000 -11.447 0.000
z 0.000 0.000 -9.977
Traceless
 xyz
x -0.735 0.000 0.000
y 0.000 -0.735 0.000
z 0.000 0.000 1.470
Polar
3z2-r22.939
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 1.054 0.000 0.000
y 0.000 1.054 0.000
z 0.000 0.000 3.061


<r2> (average value of r2) Å2
<r2> 14.064
(<r2>)1/2 3.750