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

using model chemistry: CISD/Def2TZVPP

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 CISD/Def2TZVPP
 hartrees
Energy at 0K-93.234552
Energy at 298.15K-93.234692
HF Energy-92.912775
Nuclear repulsion energy24.091495
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 CISD/Def2TZVPP
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 3521 3521 70.37      
2 Σ 2248 2248 2.02      
3 Π 780 780 35.74      
3 Π 780 780 35.74      

Unscaled Zero Point Vibrational Energy (zpe) 3665.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3665.2 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 CISD/Def2TZVPP
B
1.50593

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/Def2TZVPP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.496
H2 0.000 0.000 -1.558
N3 0.000 0.000 0.648

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06201.1443
H21.06202.2063
N31.14432.2063

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