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

using model chemistry: B2PLYP=FULL/6-31+G**

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 B2PLYP=FULL/6-31+G**
 hartrees
Energy at 0K-93.346768
Energy at 298.15K-93.346869
HF Energy-93.243877
Nuclear repulsion energy23.711649
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 B2PLYP=FULL/6-31+G**
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 3490 3319 70.57 32.66 0.23 0.37
2 Σ 2133 2028 0.50 44.64 0.14 0.25
3 Π 733 697 50.71 0.76 0.75 0.86
3 Π 733 697 50.71 0.76 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3543.7 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 3370.0 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 B2PLYP=FULL/6-31+G**
B
1.45863

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31+G**

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 -1.574
N3 0.000 0.000 0.659

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06761.1649
H21.06762.2326
N31.16492.2326

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