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

using model chemistry: B3PW91/6-31+G**

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 B3PW91/6-31+G**
 hartrees
Energy at 0K-93.387404
Energy at 298.15K-93.387524
HF Energy-93.387404
Nuclear repulsion energy23.832183
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 B3PW91/6-31+G**
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 3472 3333 65.57      
2 Σ 2211 2122 1.87      
3 Π 757 726 50.95      
3 Π 756 726 50.95      

Unscaled Zero Point Vibrational Energy (zpe) 3597.6 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 3454.1 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 B3PW91/6-31+G**
B
1.47365

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.502
H2 0.000 0.000 -1.573
N3 0.000 0.000 0.655

Atom - Atom Distances (Å)
  C1 H2 N3
C11.07101.1573
H21.07102.2282
N31.15732.2282

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

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.067      
2 H 0.259      
3 N -0.327      


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 -3.063 3.063
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.780 0.000 0.000
y 0.000 -11.780 0.000
z 0.000 0.000 -9.718
Traceless
 xyz
x -1.031 0.000 0.000
y 0.000 -1.031 0.000
z 0.000 0.000 2.062
Polar
3z2-r24.124
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 1.487 -0.000 0.001
y -0.000 1.487 0.000
z 0.001 0.000 3.329


<r2> (average value of r2) Å2
<r2> 13.920
(<r2>)1/2 3.731