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

using model chemistry: MP2/6-31G(2df,p)

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 MP2/6-31G(2df,p)
 hartrees
Energy at 0K-93.212991
Energy at 298.15K-93.213120
HF Energy-92.880204
Nuclear repulsion energy23.635151
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 MP2/6-31G(2df,p)
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 3527 3331 73.21 29.07 0.25 0.39
2 Σ 2035 1922 0.06 24.61 0.19 0.31
3 Π 768 726 29.46 0.00 0.75 0.86
3 Π 768 726 29.46 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3549.1 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 3352.1 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 MP2/6-31G(2df,p)
B
1.44907

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.509
H2 0.000 0.000 -1.574
N3 0.000 0.000 0.661

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06491.1700
H21.06492.2349
N31.17002.2349

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