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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-93.276176
Energy at 298.15K-93.276320
HF Energy-93.276176
Nuclear repulsion energy23.687047
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 3523 3368 60.90 28.29 0.22 0.36
2 Σ 2173 2077 2.44 33.69 0.24 0.39
3 Π 791 756 62.06 0.29 0.75 0.86
3 Π 791 756 62.06 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3638.7 cm-1
Scaled (by 0.9559) Zero Point Vibrational Energy (zpe) 3478.3 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
1.45555

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 -0.507
H2 0.000 0.000 -1.574
N3 0.000 0.000 0.659

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06651.1666
H21.06652.2331
N31.16662.2331

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 -0.014      
2 H 0.288      
3 N -0.274      


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 -2.968 2.968
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.471 0.000 0.000
y 0.000 -11.471 0.000
z 0.000 0.000 -9.964
Traceless
 xyz
x -0.754 0.000 0.000
y 0.000 -0.754 0.000
z 0.000 0.000 1.507
Polar
3z2-r23.014
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> 13.915
(<r2>)1/2 3.730