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

using model chemistry: CCSD/cc-pCVDZ

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 CCSD/cc-pCVDZ
 hartrees
Energy at 0K-93.181148
Energy at 298.15K-93.181257
HF Energy-92.882184
Nuclear repulsion energy23.627397
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 CCSD/cc-pCVDZ
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 3467 3467 62.48      
2 Σ 2154 2154 0.28      
3 Π 732 732 35.14      
3 Π 732 732 35.14      

Unscaled Zero Point Vibrational Energy (zpe) 3542.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3542.6 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 CCSD/cc-pCVDZ
B
1.44843

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

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 -1.587
N3 0.000 0.000 0.661

Atom - Atom Distances (Å)
  C1 H2 N3
C11.08021.1673
H21.08022.2475
N31.16732.2475

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