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

using model chemistry: HF/daug-cc-pVTZ

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/daug-cc-pVTZ
 hartrees
Energy at 0K-92.911513
Energy at 298.15K-92.911712
HF Energy-92.911513
Nuclear repulsion energy24.469179
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/daug-cc-pVTZ
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 3609 3265 70.50 15.22 0.28 0.44
2 Σ 2406 2176 10.93 74.58 0.06 0.10
3 Π 879 795 34.77 0.62 0.75 0.86
3 Π 879 795 34.77 0.62 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3885.9 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 3515.2 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/daug-cc-pVTZ
B
1.55356

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.487
H2 0.000 0.000 -1.544
N3 0.000 0.000 0.638

Atom - Atom Distances (Å)
  C1 H2 N3
C11.05721.1243
H21.05722.1815
N31.12432.1815

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/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.259      
2 H 2.051      
3 N -0.792      


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 -3.263 3.263
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.826 0.000 0.000
y 0.000 -11.826 0.000
z 0.000 0.000 -9.611
Traceless
 xyz
x -1.108 0.000 0.000
y 0.000 -1.108 0.000
z 0.000 0.000 2.215
Polar
3z2-r24.430
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 1.996 0.000 0.000
y 0.000 1.996 0.000
z 0.000 0.000 3.187


<r2> (average value of r2) Å2
<r2> 13.576
(<r2>)1/2 3.685