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

using model chemistry: QCISD/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-93.220569
Energy at 298.15K-93.220712
HF Energy-92.882456
Nuclear repulsion energy23.845533
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/6-31G(2df,p)
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 3515 3330 60.41      
2 Σ 2169 2055 1.00      
3 Π 786 745 29.07      
3 Π 786 745 29.07      

Unscaled Zero Point Vibrational Energy (zpe) 3628.5 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 3437.6 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/6-31G(2df,p)
B
1.47524

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.502
H2 0.000 0.000 -1.567
N3 0.000 0.000 0.654

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06551.1553
H21.06552.2209
N31.15532.2209

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