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

using model chemistry: MP3=FULL/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 MP3=FULL/3-21G*
 hartrees
Energy at 0K-92.556998
Energy at 298.15K-92.557184
HF Energy-92.352411
Nuclear repulsion energy23.783913
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 MP3=FULL/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 3523 3523 53.87      
2 Σ 2219 2219 0.58      
3 Π 857 857 55.07      
3 Π 857 857 55.07      

Unscaled Zero Point Vibrational Energy (zpe) 3727.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3727.9 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 MP3=FULL/3-21G*
B
1.46752

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/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
C11.06381.1615
H21.06382.2253
N31.16152.2253

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