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

using model chemistry: CCSD=FULL/cc-pVTZ

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=FULL/cc-pVTZ
 hartrees
Energy at 0K-93.285335
Energy at 298.15K-93.285456
HF Energy-92.908587
Nuclear repulsion energy24.006130
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=FULL/cc-pVTZ
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 3486 3305 62.64      
2 Σ 2191 2078 0.46      
3 Π 753 714 35.31      
3 Π 753 714 35.31      

Unscaled Zero Point Vibrational Energy (zpe) 3591.8 cm-1
Scaled (by 0.9481) Zero Point Vibrational Energy (zpe) 3405.4 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=FULL/cc-pVTZ
B
1.49518

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.498
H2 0.000 0.000 -1.557
N3 0.000 0.000 0.650

Atom - Atom Distances (Å)
  C1 H2 N3
C11.05891.1481
H21.05892.2071
N31.14812.2071

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