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

using model chemistry: CCSD/daug-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 CCSD/daug-cc-pVTZ
 hartrees
Energy at 0K-93.263250
Energy at 298.15K-93.263357
HF Energy-92.909382
Nuclear repulsion energy23.932205
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 CCSD/daug-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 3452 3452 66.80      
2 Σ 2173 2173 0.62      
3 Π 741 741 35.05      
3 Π 741 741 35.05      

Unscaled Zero Point Vibrational Energy (zpe) 3552.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3552.7 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 CCSD/daug-cc-pVTZ
B
1.48604

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.500
H2 0.000 0.000 -1.566
N3 0.000 0.000 0.652

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06581.1526
H21.06582.2184
N31.15262.2184

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