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

using model chemistry: MP2/6-311+G(3df,2p)

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 MP2/6-311+G(3df,2p)
 hartrees
Energy at 0K-93.253093
Energy at 298.15K-93.253195
HF Energy-92.904986
Nuclear repulsion energy23.708003
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 MP2/6-311+G(3df,2p)
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 3465 3269 78.36 33.77 0.19 0.32
2 Σ 2030 1915 0.20 42.70 0.08 0.15
3 Π 731 690 36.59 0.21 0.75 0.86
3 Π 731 690 36.59 0.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3478.7 cm-1
Scaled (by 0.9434) Zero Point Vibrational Energy (zpe) 3281.8 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 MP2/6-311+G(3df,2p)
B
1.45813

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.507
H2 0.000 0.000 -1.572
N3 0.000 0.000 0.659

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06571.1655
H21.06572.2313
N31.16552.2313

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