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

using model chemistry: PBEPBE/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-93.343283
Energy at 298.15K-93.343382
HF Energy-93.343283
Nuclear repulsion energy23.800296
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/6-311+G(3df,2p)
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 3358 3330 58.62 32.75 0.23 0.37
2 Σ 2120 2103 0.13 59.33 0.09 0.16
3 Π 726 720 38.12 0.30 0.75 0.86
3 Π 726 720 38.12 0.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3465.3 cm-1
Scaled (by 0.9918) Zero Point Vibrational Energy (zpe) 3436.9 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/6-311+G(3df,2p)
B
1.46974

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311+G(3df,2p)

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
C11.07531.1582
H21.07532.2336
N31.15822.2336

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/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.429      
2 H 0.257      
3 N -0.686      


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 -2.957 2.957
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.841 0.000 0.000
y 0.000 -11.841 0.000
z 0.000 0.000 -9.917
Traceless
 xyz
x -0.962 0.000 0.000
y 0.000 -0.962 0.000
z 0.000 0.000 1.924
Polar
3z2-r23.848
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 2.098 0.000 0.000
y 0.000 2.098 0.000
z 0.000 0.000 3.478


<r2> (average value of r2) Å2
<r2> 14.010
(<r2>)1/2 3.743