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

using model chemistry: QCISD/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/6-311+G(3df,2p)
 hartrees
Energy at 0K-93.257874
Energy at 298.15K-93.257995
HF Energy-92.907173
Nuclear repulsion energy23.922585
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/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 3457 3297 65.49      
2 Σ 2163 2062 0.68      
3 Π 754 719 35.15      
3 Π 754 719 35.15      

Unscaled Zero Point Vibrational Energy (zpe) 3563.7 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 3398.7 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 QCISD/6-311+G(3df,2p)
B
1.48485

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.500
H2 0.000 0.000 -1.567
N3 0.000 0.000 0.653

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06681.1529
H21.06682.2197
N31.15292.2197

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