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

using model chemistry: PBEPBE/Def2TZVPP

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 PBEPBE/Def2TZVPP
 hartrees
Energy at 0K-93.347506
Energy at 298.15K-93.347610
HF Energy-93.347506
Nuclear repulsion energy23.796326
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 PBEPBE/Def2TZVPP
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 3363 3323 56.66 33.84 0.22 0.36
2 Σ 2122 2096 0.13 49.14 0.14 0.25
3 Π 736 727 38.05 0.27 0.75 0.86
3 Π 736 727 38.05 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3478.1 cm-1
Scaled (by 0.9879) Zero Point Vibrational Energy (zpe) 3436.0 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 PBEPBE/Def2TZVPP
B
1.46925

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/Def2TZVPP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.502
H2 0.000 0.000 -1.578
N3 0.000 0.000 0.656

Atom - Atom Distances (Å)
  C1 H2 N3
C11.07541.1584
H21.07542.2338
N31.15842.2338

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 PBEPBE/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.271      
2 H 0.210      
3 N 0.061      


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 -2.926 2.926
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.779 0.000 0.000
y 0.000 -11.779 0.000
z 0.000 0.000 -9.830
Traceless
 xyz
x -0.975 0.000 0.000
y 0.000 -0.975 0.000
z 0.000 0.000 1.949
Polar
3z2-r23.898
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 1.756 0.000 0.000
y 0.000 1.756 0.000
z 0.000 0.000 3.347


<r2> (average value of r2) Å2
<r2> 13.968
(<r2>)1/2 3.737