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

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31G
 hartrees
Energy at 0K-93.284605
Energy at 298.15K-93.284749
HF Energy-93.284605
Nuclear repulsion energy23.692028
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 HSEh1PBE/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 3523 3370 60.01 28.60 0.22 0.36
2 Σ 2172 2078 2.43 33.69 0.24 0.39
3 Π 791 757 61.53 0.28 0.75 0.86
3 Π 791 757 61.53 0.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3638.4 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 3480.5 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 HSEh1PBE/6-31G
B
1.45616

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.507
H2 0.000 0.000 -1.573
N3 0.000 0.000 0.659

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06621.1664
H21.06622.2326
N31.16642.2326

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 HSEh1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.015      
2 H 0.286      
3 N -0.271      


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 -2.965 2.965
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.461 0.000 0.000
y 0.000 -11.461 0.000
z 0.000 0.000 -9.968
Traceless
 xyz
x -0.747 0.000 0.000
y 0.000 -0.747 0.000
z 0.000 0.000 1.493
Polar
3z2-r22.987
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 1.032 0.000 0.000
y 0.000 1.032 0.000
z 0.000 0.000 2.996


<r2> (average value of r2) Å2
<r2> 13.908
(<r2>)1/2 3.729