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

using model chemistry: B3LYP/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 B3LYP/6-31+G**
 hartrees
Energy at 0K-93.430614
Energy at 298.15K-93.430730
HF Energy-93.430614
Nuclear repulsion energy23.827151
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 B3LYP/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 3463 3339 67.61 28.98 0.23 0.38
2 Σ 2203 2124 2.05 51.15 0.14 0.25
3 Π 751 724 50.24 0.85 0.75 0.86
3 Π 751 724 50.24 0.85 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3584.2 cm-1
Scaled (by 0.9642) Zero Point Vibrational Energy (zpe) 3455.9 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 B3LYP/6-31+G**
B
1.47302

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/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
C11.07041.1577
H21.07042.2281
N31.15772.2281

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 B3LYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.105      
2 H 0.239      
3 N -0.344      


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 -3.073 3.073
CHELPG        
AIM        
ESP 0.000 0.000 -3.027 3.027


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.881 0.000 0.000
y 0.000 -11.881 0.000
z 0.000 0.000 -9.876
Traceless
 xyz
x -1.002 0.000 0.000
y 0.000 -1.002 0.000
z 0.000 0.000 2.004
Polar
3z2-r24.009
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 1.530 0.000 0.000
y 0.000 1.530 0.000
z 0.000 0.000 3.384


<r2> (average value of r2) Å2
<r2> 13.997
(<r2>)1/2 3.741