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

using model chemistry: MP2/daug-cc-pVDZ

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/daug-cc-pVDZ
 hartrees
Energy at 0K-93.184843
Energy at 298.15K-93.184921
HF Energy-92.882816
Nuclear repulsion energy23.379344
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/daug-cc-pVDZ
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 3452 3452 74.17 38.53 0.19 0.32
2 Σ 1991 1991 0.56 47.90 0.07 0.12
3 Π 700 700 38.53 0.12 0.75 0.86
3 Π 700 700 38.53 0.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3421.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3421.2 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/daug-cc-pVDZ
B
1.41789

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/daug-cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.514
H2 0.000 0.000 -1.592
N3 0.000 0.000 0.668

Atom - Atom Distances (Å)
  C1 H2 N3
C11.07711.1827
H21.07712.2598
N31.18272.2598

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