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

using model chemistry: B1B95/STO-3G

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 B1B95/STO-3G
 hartrees
Energy at 0K-92.182329
Energy at 298.15K-92.182431
HF Energy-92.182329
Nuclear repulsion energy23.261345
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 B1B95/STO-3G
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 3647 3221 129.85 19.90 0.30 0.46
2 Σ 2249 1986 0.21 16.41 0.22 0.35
3 Π 814 718 27.91 0.07 0.75 0.86
3 Π 814 718 27.91 0.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3761.8 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 3321.7 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 B1B95/STO-3G
B
1.40370

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.516
H2 0.000 0.000 -1.603
N3 0.000 0.000 0.672

Atom - Atom Distances (Å)
  C1 H2 N3
C11.08621.1879
H21.08622.2741
N31.18792.2741

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 B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.001      
2 H 0.154      
3 N -0.153      


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 -2.320 2.320
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.441 0.000 0.000
y 0.000 -10.441 0.000
z 0.000 0.000 -9.460
Traceless
 xyz
x -0.491 0.000 0.000
y 0.000 -0.491 0.000
z 0.000 0.000 0.981
Polar
3z2-r21.962
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 0.437 0.000 0.000
y 0.000 0.437 0.000
z 0.000 0.000 1.826


<r2> (average value of r2) Å2
<r2> 13.642
(<r2>)1/2 3.693