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: B97D3/cc-pVTZ

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 B97D3/cc-pVTZ
 hartrees
Energy at 0K-93.398313
Energy at 298.15K-93.398419
HF Energy-93.398313
Nuclear repulsion energy23.866801
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 B97D3/cc-pVTZ
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 3394 3347 47.82 29.98 0.24 0.39
2 Σ 2128 2098 0.13 45.96 0.15 0.26
3 Π 734 724 36.54 0.20 0.75 0.86
3 Π 734 724 36.54 0.20 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3495.1 cm-1
Scaled (by 0.986) Zero Point Vibrational Energy (zpe) 3446.2 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 B97D3/cc-pVTZ
B
1.47795

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/cc-pVTZ

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
C11.07031.1554
H21.07032.2257
N31.15542.2257

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 B97D3/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.073      
2 H 0.130      
3 N -0.057      


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 -2.897 2.897
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.621 0.000 0.000
y 0.000 -11.621 0.000
z 0.000 0.000 -9.719
Traceless
 xyz
x -0.951 0.000 0.000
y 0.000 -0.951 0.000
z 0.000 0.000 1.902
Polar
3z2-r23.805
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 1.676 0.000 0.000
y 0.000 1.676 0.000
z 0.000 0.000 3.231


<r2> (average value of r2) Å2
<r2> 13.835
(<r2>)1/2 3.720