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

using model chemistry: B3LYPultrafine/3-21G

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 B3LYPultrafine/3-21G
 hartrees
Energy at 0K-92.907630
Energy at 298.15K-92.907840
HF Energy-92.907630
Nuclear repulsion energy23.794288
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 B3LYPultrafine/3-21G
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 3496 3374 56.72 26.11 0.23 0.37
2 Σ 2176 2099 0.41 26.84 0.26 0.41
3 Π 901 869 55.84 0.03 0.75 0.86
3 Π 901 869 55.84 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3736.6 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 3605.4 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 B3LYPultrafine/3-21G
B
1.46881

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.504
H2 0.000 0.000 -1.568
N3 0.000 0.000 0.656

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06371.1609
H21.06372.2247
N31.16092.2247

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 B3LYPultrafine/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.079      
2 H 0.311      
3 N -0.390      


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 -2.722 2.722
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.363 0.000 0.000
y 0.000 -11.363 0.000
z 0.000 0.000 -9.995
Traceless
 xyz
x -0.684 0.000 0.000
y 0.000 -0.684 0.000
z 0.000 0.000 1.368
Polar
3z2-r22.737
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 0.913 0.000 0.000
y 0.000 0.913 0.000
z 0.000 0.000 2.704


<r2> (average value of r2) Å2
<r2> 13.815
(<r2>)1/2 3.717