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

using model chemistry: QCISD(T)/TZVP

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 QCISD(T)/TZVP
 hartrees
Energy at 0K-93.228749
Energy at 298.15K-93.228838
HF Energy-92.904245
Nuclear repulsion energy23.765714
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 QCISD(T)/TZVP
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 3469 3341        
2 Σ 2118 2040        
3 Π 715 688        
3 Π 715 688        

Unscaled Zero Point Vibrational Energy (zpe) 3507.7 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 3378.6 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 QCISD(T)/TZVP
B
1.46608

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/TZVP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.504
H2 0.000 0.000 -1.572
N3 0.000 0.000 0.657

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06741.1615
H21.06742.2289
N31.16152.2289

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