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

using model chemistry: CCSD/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 CCSD/6-311+G(3df,2p)
 hartrees
Energy at 0K-93.256680
Energy at 298.15K-93.256802
HF Energy-92.907346
Nuclear repulsion energy23.944273
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/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 3461 3264 67.37      
2 Σ 2175 2052 0.62      
3 Π 756 713 35.27      
3 Π 756 713 35.27      

Unscaled Zero Point Vibrational Energy (zpe) 3573.8 cm-1
Scaled (by 0.9431) Zero Point Vibrational Energy (zpe) 3370.5 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/6-311+G(3df,2p)
B
1.48755

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/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 -1.566
N3 0.000 0.000 0.652

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06661.1517
H21.06662.2183
N31.15172.2183

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