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

using model chemistry: CISD/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-93.231892
Energy at 298.15K-93.232031
HF Energy-92.909131
Nuclear repulsion energy24.084375
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/cc-pVTZ
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 3528 3281 66.24      
2 Σ 2245 2087 1.84      
3 Π 777 723 35.48      
3 Π 777 723 35.48      

Unscaled Zero Point Vibrational Energy (zpe) 3663.9 cm-1
Scaled (by 0.9298) Zero Point Vibrational Energy (zpe) 3406.7 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/cc-pVTZ
B
1.50502

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.497
H2 0.000 0.000 -1.558
N3 0.000 0.000 0.648

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06101.1449
H21.06102.2059
N31.14492.2059

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