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

using model chemistry: HF/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-92.836857
Energy at 298.15K-92.837056
HF Energy-92.836857
Nuclear repulsion energy24.004977
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/LANL2DZ
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 3698 3328 66.45 22.13 0.18 0.30
2 Σ 2328 2095 12.76 51.25 0.19 0.32
3 Π 883 795 65.63 1.69 0.75 0.86
3 Π 883 795 65.63 1.69 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3896.1 cm-1
Scaled (by 0.8999) Zero Point Vibrational Energy (zpe) 3506.1 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/LANL2DZ
B
1.49493

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/LANL2DZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.500
H2 0.000 0.000 -1.554
N3 0.000 0.000 0.651

Atom - Atom Distances (Å)
  C1 H2 N3
C11.05421.1508
H21.05422.2050
N31.15082.2050

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/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.223      
2 H 0.290      
3 N -0.067      


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 -3.298 3.298
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.856 0.000 0.000
y 0.000 -11.856 0.000
z 0.000 0.000 -10.233
Traceless
 xyz
x -0.812 0.000 0.000
y 0.000 -0.812 0.000
z 0.000 0.000 1.623
Polar
3z2-r23.246
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 1.018 0.000 0.000
y 0.000 1.018 0.000
z 0.000 0.000 3.102


<r2> (average value of r2) Å2
<r2> 13.947
(<r2>)1/2 3.735