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

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-92.548171
Energy at 298.15K-92.548365
HF Energy-92.352369
Nuclear repulsion energy23.778224
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 CID/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 3524 3283 54.44      
2 Σ 2195 2045 0.35      
3 Π 869 809 53.59      
3 Π 869 809 53.59      

Unscaled Zero Point Vibrational Energy (zpe) 3727.9 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 3472.9 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 CID/3-21G
B
1.46680

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.505
H2 0.000 0.000 -1.569
N3 0.000 0.000 0.657

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06361.1619
H21.06362.2255
N31.16192.2255

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