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

using model chemistry: BLYP/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 BLYP/6-31G**
 hartrees
Energy at 0K-93.401727
Energy at 298.15K-93.401826
HF Energy-93.401727
Nuclear repulsion energy23.611773
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 BLYP/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 3390 3364 46.38 33.77 0.24 0.38
2 Σ 2120 2104 0.47 33.72 0.25 0.40
3 Π 732 726 34.11 0.00 0.75 0.86
3 Π 732 726 34.11 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3486.7 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 3459.9 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 BLYP/6-31G**
B
1.44643

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.508
H2 0.000 0.000 -1.583
N3 0.000 0.000 0.661

Atom - Atom Distances (Å)
  C1 H2 N3
C11.07531.1692
H21.07532.2446
N31.16922.2446

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 BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.174      
2 H 0.182      
3 N -0.356      


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 -2.783 2.783
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.381 0.000 0.000
y 0.000 -11.381 0.000
z 0.000 0.000 -9.644
Traceless
 xyz
x -0.869 0.000 0.000
y 0.000 -0.869 0.000
z 0.000 0.000 1.737
Polar
3z2-r23.475
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 1.167 0.000 0.000
y 0.000 1.167 0.000
z 0.000 0.000 3.028


<r2> (average value of r2) Å2
<r2> 13.862
(<r2>)1/2 3.723