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: wB97X-D/cc-pCVQZ

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 wB97X-D/cc-pCVQZ
 hartrees
Energy at 0K-93.430138
Energy at 298.15K 
HF Energy-93.430138
Nuclear repulsion energy24.108786
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 wB97X-D/cc-pCVQZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 3454 3454 67.79      
2 Σ 2233 2233 2.20      
3 Π 753 753 37.07      
3 Π 753 753 37.07      

Unscaled Zero Point Vibrational Energy (zpe) 3596.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3596.9 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 wB97X-D/cc-pCVQZ
B
1.50813

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/cc-pCVQZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.495
H2 0.000 0.000 -1.562
N3 0.000 0.000 0.647

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06651.1424
H21.06652.2089
N31.14242.2089

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
Charges from optimized geometry at wB97X-D/cc-pCVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.121      
2 H 0.178      
3 N -0.057      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -3.052 3.052
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.858 0.000 0.000
y 0.000 1.858 0.000
z 0.000 0.000 3.250


<r2> (average value of r2) Å2
<r2> 13.704
(<r2>)1/2 3.702