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

using model chemistry: HF/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/cc-pVTZ
 hartrees
Energy at 0K-92.910229
Energy at 298.15K-92.910430
HF Energy-92.910229
Nuclear repulsion energy24.464315
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-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 3616 3291 66.70 14.15 0.24 0.39
2 Σ 2407 2190 9.88 51.64 0.13 0.22
3 Π 877 798 35.53 0.76 0.75 0.86
3 Π 877 798 35.53 0.76 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3888.3 cm-1
Scaled (by 0.9101) Zero Point Vibrational Energy (zpe) 3538.8 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-pVTZ
B
1.55294

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/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
C11.05681.1247
H21.05682.1814
N31.12472.1814

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

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.082      
2 H 0.198      
3 N -0.115      


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 -3.227 3.227
CHELPG        
AIM 0.000 0.000 2.201 2.201
ESP 0.000 0.000 -3.200 3.200


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.751 0.000 0.000
y 0.000 -11.751 0.000
z 0.000 0.000 -9.563
Traceless
 xyz
x -1.094 0.000 0.000
y 0.000 -1.094 0.000
z 0.000 0.000 2.188
Polar
3z2-r24.375
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 1.587 0.000 0.000
y 0.000 1.587 0.000
z 0.000 0.000 3.038


<r2> (average value of r2) Å2
<r2> 13.537
(<r2>)1/2 3.679