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

using model chemistry: G3MP2

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 G3MP2
 hartrees
Energy at 0K-93.298949
Energy at 298.15K-93.295483
HF Energy-92.875197
Nuclear repulsion energy24.313445
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 HF/6-31G*
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 3676 3464 60.72 17.31 0.24 0.38
2 Σ 2439 2298 11.81 39.51 0.23 0.38
3 Π 891 840 38.07 0.46 0.75 0.86
3 Π 891 840 38.07 0.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3948.6 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 3720.4 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 MP2=FULL/6-31G*
B
1.43471

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.512
H2 0.000 0.000 -1.581
N3 0.000 0.000 0.664

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06901.1761
H21.06902.2451
N31.17612.2451

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