return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: M06-2X/cc-pVDZ

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 M06-2X/cc-pVDZ
 hartrees
Energy at 0K-93.396221
Energy at 298.15K-93.396371
HF Energy-93.396221
Nuclear repulsion energy23.890575
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 M06-2X/cc-pVDZ
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 3491 3491 77.37 23.46 0.26 0.41
2 Σ 2263 2263 3.91 37.87 0.21 0.35
3 Π 795 795 35.36 0.05 0.75 0.86
3 Π 795 795 35.36 0.05 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3671.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3671.8 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 M06-2X/cc-pVDZ
B
1.48095

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.500
H2 0.000 0.000 -1.576
N3 0.000 0.000 0.653

Atom - Atom Distances (Å)
  C1 H2 N3
C11.07651.1528
H21.07652.2293
N31.15282.2293

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 M06-2X/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.011      
2 H 0.104      
3 N -0.093      


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 -2.849 2.849
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.527 0.000 0.000
y 0.000 -11.527 0.000
z 0.000 0.000 -9.449
Traceless
 xyz
x -1.039 0.000 0.000
y 0.000 -1.039 0.000
z 0.000 0.000 2.078
Polar
3z2-r24.156
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 1.249 0.000 0.000
y 0.000 1.249 0.000
z 0.000 0.000 2.949


<r2> (average value of r2) Å2
<r2> 13.736
(<r2>)1/2 3.706