return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2=FULL/daug-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 MP2=FULL/daug-cc-pVTZ
 hartrees
Energy at 0K-93.294280
Energy at 298.15K-93.294362
HF Energy-92.907842
Nuclear repulsion energy23.786432
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/daug-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 3466 3466 77.57 33.92 0.19 0.31
2 Σ 2050 2050 0.16 46.83 0.07 0.12
3 Π 711 711 35.70 0.15 0.75 0.86
3 Π 711 711 35.70 0.15 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3468.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3468.4 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 MP2=FULL/daug-cc-pVTZ
B
1.46773

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/daug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.505
H2 0.000 0.000 -1.565
N3 0.000 0.000 0.657

Atom - Atom Distances (Å)
  C1 H2 N3
C11.05991.1622
H21.05992.2221
N31.16222.2221

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