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

using model chemistry: MP2=FULL/STO-3G

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 MP2=FULL/STO-3G
 hartrees
Energy at 0K-91.839045
Energy at 298.15K-91.839101
HF Energy-91.661664
Nuclear repulsion energy22.689044
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 MP2=FULL/STO-3G
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 3672 3264 95.16 25.45 0.31 0.47
2 Σ 1901 1690 7.70 8.22 0.21 0.34
3 Π 758 674 22.16 0.17 0.75 0.86
3 Π 758 674 22.16 0.17 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3544.9 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 3151.1 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 MP2=FULL/STO-3G
B
1.33459

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.534
H2 0.000 0.000 -1.621
N3 0.000 0.000 0.689

Atom - Atom Distances (Å)
  C1 H2 N3
C11.08741.2234
H21.08742.3109
N31.22342.3109

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