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

using model chemistry: PBEPBE/cc-pCVTZ

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 PBEPBE/cc-pCVTZ
 hartrees
Energy at 0K-93.347062
Energy at 298.15K-93.347169
HF Energy-93.347062
Nuclear repulsion energy23.802903
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 PBEPBE/cc-pCVTZ
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 3357 3357 55.09      
2 Σ 2120 2120 0.06      
3 Π 733 733 36.42      
3 Π 733 733 36.42      

Unscaled Zero Point Vibrational Energy (zpe) 3471.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3471.2 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 PBEPBE/cc-pCVTZ
B
1.47007

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/cc-pCVTZ

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 -1.578
N3 0.000 0.000 0.656

Atom - Atom Distances (Å)
  C1 H2 N3
C11.07541.1581
H21.07542.2335
N31.15812.2335

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 PBEPBE/cc-pCVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.109      
2 H 0.183      
3 N -0.074      


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 -2.883 2.883
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.680 0.000 0.000
y 0.000 1.680 0.000
z 0.000 0.000 3.243


<r2> (average value of r2) Å2
<r2> 13.912
(<r2>)1/2 3.730