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

using model chemistry: BLYP/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-93.442060
Energy at 298.15K-93.442154
HF Energy-93.442060
Nuclear repulsion energy23.829188
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/aug-cc-pVTZ
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 3360 3349 56.79 34.05 0.24 0.39
2 Σ 2111 2104 0.23 65.07 0.08 0.14
3 Π 719 717 37.29 0.27 0.75 0.86
3 Π 719 717 37.29 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3455.1 cm-1
Scaled (by 0.9966) Zero Point Vibrational Energy (zpe) 3443.4 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/aug-cc-pVTZ
B
1.47329

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/aug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.502
H2 0.000 0.000 -1.574
N3 0.000 0.000 0.655

Atom - Atom Distances (Å)
  C1 H2 N3
C11.07151.1573
H21.07152.2289
N31.15732.2289

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 BLYP/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.307      
2 H 0.561      
3 N -0.254      


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 -2.967 2.967
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.899 0.000 0.000
y 0.000 -11.899 0.000
z 0.000 0.000 -10.060
Traceless
 xyz
x -0.920 0.000 0.000
y 0.000 -0.920 0.000
z 0.000 0.000 1.839
Polar
3z2-r23.678
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 2.198 0.000 0.000
y 0.000 2.198 0.000
z 0.000 0.000 3.516


<r2> (average value of r2) Å2
<r2> 14.044
(<r2>)1/2 3.747