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

using model chemistry: B2PLYP/6-31+G**

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 B2PLYP/6-31+G**
 hartrees
Energy at 0K-93.344250
Energy at 298.15K-93.344349
HF Energy-93.243846
Nuclear repulsion energy23.705102
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 B2PLYP/6-31+G**
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 3488 3322 70.51 32.76 0.23 0.37
2 Σ 2131 2030 0.49 44.66 0.14 0.25
3 Π 730 696 50.77 0.76 0.75 0.86
3 Π 730 696 50.77 0.76 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3539.9 cm-1
Scaled (by 0.9524) Zero Point Vibrational Energy (zpe) 3371.4 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 B2PLYP/6-31+G**
B
1.45782

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.506
H2 0.000 0.000 -1.574
N3 0.000 0.000 0.659

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06791.1653
H21.06792.2332
N31.16532.2332

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 B2PLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.083      
2 H 0.246      
3 N -0.329      


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 -3.071 3.071
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.891 0.000 0.000
y 0.000 -11.891 0.000
z 0.000 0.000 -9.956
Traceless
 xyz
x -0.968 0.000 0.000
y 0.000 -0.968 0.000
z 0.000 0.000 1.935
Polar
3z2-r23.871
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 1.509 0.000 0.000
y 0.000 1.509 0.000
z 0.000 0.000 3.338


<r2> (average value of r2) Å2
<r2> 14.080
(<r2>)1/2 3.752