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

using model chemistry: HF/cc-pVQZ

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 HF/cc-pVQZ
 hartrees
Energy at 0K-92.916736
Energy at 298.15K-92.916936
HF Energy-92.916736
Nuclear repulsion energy24.487626
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 HF/cc-pVQZ
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 3605 3275 70.36 15.40 0.25 0.39
2 Σ 2408 2188 10.21 59.53 0.09 0.17
3 Π 878 798 34.97 0.81 0.75 0.86
3 Π 878 798 34.97 0.81 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3885.0 cm-1
Scaled (by 0.9084) Zero Point Vibrational Energy (zpe) 3529.2 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 HF/cc-pVQZ
B
1.55590

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/cc-pVQZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.486
H2 0.000 0.000 -1.543
N3 0.000 0.000 0.637

Atom - Atom Distances (Å)
  C1 H2 N3
C11.05721.1233
H21.05722.1805
N31.12332.1805

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 HF/cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.026      
2 H 0.150      
3 N -0.176      


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 -3.252 3.252
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.790 0.000 0.000
y 0.000 -11.790 0.000
z 0.000 0.000 -9.597
Traceless
 xyz
x -1.097 0.000 0.000
y 0.000 -1.097 0.000
z 0.000 0.000 2.193
Polar
3z2-r24.386
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 1.781 0.000 0.000
y 0.000 1.781 0.000
z 0.000 0.000 3.124


<r2> (average value of r2) Å2
<r2> 13.549
(<r2>)1/2 3.681