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

using model chemistry: QCISD/cc-pCVQZ

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/cc-pCVQZ
 hartrees
Energy at 0K-93.284539
Energy at 298.15K 
HF Energy-92.915028
Nuclear repulsion energy23.980010
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/cc-pCVQZ
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 3462 3462 65.25      
2 Σ 2175 2175 0.66      
3 Π 747 747 34.93      
3 Π 747 747 34.93      

Unscaled Zero Point Vibrational Energy (zpe) 3566.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3566.0 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/cc-pCVQZ
B
1.49200

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pCVQZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.499
H2 0.000 0.000 -1.564
N3 0.000 0.000 0.651

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06491.1500
H21.06492.2149
N31.15002.2149

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