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

using model chemistry: MP3=FULL/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 MP3=FULL/cc-pCVQZ
 hartrees
Energy at 0K-93.390140
Energy at 298.15K 
HF Energy-92.916110
Nuclear repulsion energy24.155033
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 MP3=FULL/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 3505 3505 73.23      
2 Σ 2268 2268 1.67      
3 Π 765 765 35.54      
3 Π 765 765 35.54      

Unscaled Zero Point Vibrational Energy (zpe) 3651.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3651.7 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 MP3=FULL/cc-pCVQZ
B
1.51390

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/cc-pCVQZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.495
H2 0.000 0.000 -1.556
N3 0.000 0.000 0.646

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06161.1408
H21.06162.2024
N31.14082.2024

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