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

using model chemistry: QCISD(T)/6-311+G(3df,2p)

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)/6-311+G(3df,2p)
 hartrees
Energy at 0K-93.275354
Energy at 298.15K-93.275454
HF Energy-92.906135
Nuclear repulsion energy23.806429
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)/6-311+G(3df,2p)
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 3432 3274        
2 Σ 2107 2009        
3 Π 728 694        
3 Π 728 694        

Unscaled Zero Point Vibrational Energy (zpe) 3497.5 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 3335.6 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)/6-311+G(3df,2p)
B
1.46966

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311+G(3df,2p)

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 -1.572
N3 0.000 0.000 0.656

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06851.1596
H21.06852.2281
N31.15962.2281

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