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

using model chemistry: B3LYPultrafine/6-311G*

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 B3LYPultrafine/6-311G*
 hartrees
Energy at 0K-93.449143
Energy at 298.15K-93.449270
HF Energy-93.449143
Nuclear repulsion energy23.988942
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 B3LYPultrafine/6-311G*
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 3449 3333 50.83 24.01 0.27 0.43
2 Σ 2200 2126 1.59 38.49 0.21 0.35
3 Π 765 740 39.12 0.47 0.75 0.86
3 Π 765 740 39.12 0.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3589.7 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 3468.7 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 B3LYPultrafine/6-311G*
B
1.49315

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.498
H2 0.000 0.000 -1.566
N3 0.000 0.000 0.651

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06821.1489
H21.06822.2170
N31.14892.2170

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 B3LYPultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.081      
2 H 0.297      
3 N -0.216      


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 -2.961 2.961
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.634 0.000 0.000
y 0.000 -11.634 0.000
z 0.000 0.000 -9.713
Traceless
 xyz
x -0.961 0.000 0.000
y 0.000 -0.961 0.000
z 0.000 0.000 1.921
Polar
3z2-r23.842
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 1.305 0.000 0.000
y 0.000 1.305 0.000
z 0.000 0.000 3.010


<r2> (average value of r2) Å2
<r2> 13.773
(<r2>)1/2 3.711