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

using model chemistry: MP2=FULL/6-31G*

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=FULL/6-31G*
 hartrees
Energy at 0K-93.166940
Energy at 298.15K-93.167035
HF Energy-92.870215
Nuclear repulsion energy23.518003
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=FULL/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 3514 3311 64.10 32.64 0.25 0.40
2 Σ 2046 1928 0.11 21.59 0.24 0.39
3 Π 731 688 38.36 0.01 0.75 0.86
3 Π 731 688 38.36 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3510.5 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 3307.6 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

Electronic state

Charges, Dipole, Quadrupole and Polarizability