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: CCSD=FULL/aug-cc-pVQZ

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/aug-cc-pVQZ
 hartrees
Energy at 0K-93.343087
Energy at 298.15K-93.343213
HF Energy-92.915472
Nuclear repulsion energy24.047970
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/aug-cc-pVQZ
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 3485 3485 67.64      
2 Σ 2200 2200 0.82      
3 Π 761 761 34.08      
3 Π 761 761 34.08      

Unscaled Zero Point Vibrational Energy (zpe) 3602.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3602.9 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/aug-cc-pVQZ
B
1.50047

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.497
H2 0.000 0.000 -1.560
N3 0.000 0.000 0.649

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06271.1466
H21.06272.2093
N31.14662.2093

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