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

using model chemistry: CISD/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 CISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-93.231211
Energy at 298.15K-93.231358
HF Energy-92.908344
Nuclear repulsion energy24.097955
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 CISD/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 3518 3243 71.46      
2 Σ 2245 2069 2.23      
3 Π 790 728 34.89      
3 Π 790 728 34.89      

Unscaled Zero Point Vibrational Energy (zpe) 3671.0 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 3383.9 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 CISD/6-311+G(3df,2p)
B
1.50674

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.496
H2 0.000 0.000 -1.558
N3 0.000 0.000 0.648

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06251.1438
H21.06252.2063
N31.14382.2063

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