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

using model chemistry: LSDA/cc-pVDZ

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 LSDA/cc-pVDZ
 hartrees
Energy at 0K-92.887090
Energy at 298.15K-92.887206
HF Energy-92.887090
Nuclear repulsion energy23.678909
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 LSDA/cc-pVDZ
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 3397 3359 68.56      
2 Σ 2158 2134 1.09      
3 Π 749 741 35.13      
3 Π 749 741 35.13      

Unscaled Zero Point Vibrational Energy (zpe) 3526.6 cm-1
Scaled (by 0.989) Zero Point Vibrational Energy (zpe) 3487.8 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 LSDA/cc-pVDZ
B
1.45483

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.504
H2 0.000 0.000 -1.591
N3 0.000 0.000 0.659

Atom - Atom Distances (Å)
  C1 H2 N3
C11.08681.1630
H21.08682.2498
N31.16302.2498

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 LSDA/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.062      
2 H 0.126      
3 N -0.064      


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 -2.769 2.769
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.508 0.000 0.000
y 0.000 -11.508 0.000
z 0.000 0.000 -9.516
Traceless
 xyz
x -0.996 0.000 0.000
y 0.000 -0.996 0.000
z 0.000 0.000 1.992
Polar
3z2-r23.984
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.284 0.000 0.000
y 0.000 1.284 0.000
z 0.000 0.000 3.005


<r2> (average value of r2) Å2
<r2> 13.868
(<r2>)1/2 3.724