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

using model chemistry: QCISD(TQ)/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 QCISD(TQ)/Def2TZVPP
 hartrees
Energy at 0K-93.277586
Energy at 298.15K-93.277674
HF Energy-92.910597
Nuclear repulsion energy23.808411
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(TQ)/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 3445 3445        
2 Σ 2122 2122        
3 Π 715 715        
3 Π 715 715        

Unscaled Zero Point Vibrational Energy (zpe) 3498.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3498.0 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(TQ)/Def2TZVPP
B
1.47139

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)/Def2TZVPP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.503
H2 0.000 0.000 -1.570
N3 0.000 0.000 0.656

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06721.1591
H21.06722.2262
N31.15912.2262

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