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

using model chemistry: MP4/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 MP4/cc-pCVQZ
 hartrees
Energy at 0K-93.307713
Energy at 298.15K 
HF Energy-92.912569
Nuclear repulsion energy23.722786
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 MP4/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 3431 3431        
2 Σ 2024 2024        
3 Π 710 710        
3 Π 710 710        

Unscaled Zero Point Vibrational Energy (zpe) 3437.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3437.3 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 MP4/cc-pCVQZ
B
1.46073

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/cc-pCVQZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.506
H2 0.000 0.000 -1.573
N3 0.000 0.000 0.658

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06701.1641
H21.06702.2311
N31.16412.2311

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