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

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-93.307220
Energy at 298.15K-93.307352
HF Energy-93.307220
Nuclear repulsion energy23.864727
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 PBE1PBE/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 3503 3329 54.55 26.03 0.24 0.38
2 Σ 2238 2127 2.25 34.76 0.24 0.39
3 Π 778 739 37.89 0.09 0.75 0.86
3 Π 778 739 37.89 0.09 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3647.7 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 3466.4 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 PBE1PBE/6-31G*
B
1.47770

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.501
H2 0.000 0.000 -1.572
N3 0.000 0.000 0.654

Atom - Atom Distances (Å)
  C1 H2 N3
C11.07101.1554
H21.07102.2264
N31.15542.2264

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 PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.085      
2 H 0.278      
3 N -0.363      


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 -2.940 2.940
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.424 0.000 0.000
y 0.000 -11.424 0.000
z 0.000 0.000 -9.448
Traceless
 xyz
x -0.988 0.000 0.000
y 0.000 -0.988 0.000
z 0.000 0.000 1.976
Polar
3z2-r23.953
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 1.147 0.000 0.000
y 0.000 1.147 0.000
z 0.000 0.000 2.949


<r2> (average value of r2) Å2
<r2> 13.699
(<r2>)1/2 3.701