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

using model chemistry: CCSD=FULL/6-31G(2df,p)

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=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-93.234564
Energy at 298.15K-93.234745
HF Energy-92.883120
Nuclear repulsion energy23.932406
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=FULL/6-31G(2df,p)
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 3536 3329 62.85      
2 Σ 2190 2062 0.99      
3 Π 846 797 28.96      
3 Π 846 797 28.96      

Unscaled Zero Point Vibrational Energy (zpe) 3708.9 cm-1
Scaled (by 0.9416) Zero Point Vibrational Energy (zpe) 3492.3 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=FULL/6-31G(2df,p)
B
1.48603

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/6-31G(2df,p)

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 -1.563
N3 0.000 0.000 0.652

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06311.1514
H21.06312.2145
N31.15142.2145

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