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

using model chemistry: HF/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 HF/6-31G
 hartrees
Energy at 0K-92.828315
Energy at 298.15K-92.828515
HF Energy-92.828315
Nuclear repulsion energy24.127125
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 HF/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 3700 3341 75.25 19.30 0.21 0.35
2 Σ 2362 2132 13.34 38.68 0.23 0.37
3 Π 881 796 68.83 1.03 0.75 0.86
3 Π 881 796 68.83 1.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3912.1 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 3532.2 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 HF/6-31G
B
1.51026

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.497
H2 0.000 0.000 -1.549
N3 0.000 0.000 0.647

Atom - Atom Distances (Å)
  C1 H2 N3
C11.05241.1442
H21.05242.1967
N31.14422.1967

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

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.037      
2 H 0.329      
3 N -0.292      


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 -3.241 3.241
CHELPG 0.000 0.000 -3.147 3.147
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.660 0.000 0.000
y 0.000 -11.660 0.000
z 0.000 0.000 -10.167
Traceless
 xyz
x -0.746 0.000 0.000
y 0.000 -0.746 0.000
z 0.000 0.000 1.493
Polar
3z2-r22.986
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 0.977 0.000 0.000
y 0.000 0.977 0.000
z 0.000 0.000 2.983


<r2> (average value of r2) Å2
<r2> 13.787
(<r2>)1/2 3.713