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

using model chemistry: B1B95/aug-cc-pVTZ

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 B1B95/aug-cc-pVTZ
 hartrees
Energy at 0K-93.419438
Energy at 298.15K-93.419571
HF Energy-93.419438
Nuclear repulsion energy24.100692
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 B1B95/aug-cc-pVTZ
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 3466 3322 64.82 26.39 0.23 0.38
2 Σ 2225 2133 1.76 63.94 0.07 0.13
3 Π 769 737 35.57 0.29 0.75 0.86
3 Π 769 737 35.57 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3614.1 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 3464.1 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 B1B95/aug-cc-pVTZ
B
1.50710

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/aug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.496
H2 0.000 0.000 -1.560
N3 0.000 0.000 0.648

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06441.1433
H21.06442.2077
N31.14332.2077

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 B1B95/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.398      
2 H 0.688      
3 N -0.291      


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 -3.024 3.024
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.706 0.000 0.000
y 0.000 -11.706 0.000
z 0.000 0.000 -9.721
Traceless
 xyz
x -0.992 0.000 0.000
y 0.000 -0.992 0.000
z 0.000 0.000 1.985
Polar
3z2-r23.969
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 2.073 0.000 0.000
y 0.000 2.073 0.000
z 0.000 0.000 3.327


<r2> (average value of r2) Å2
<r2> 13.742
(<r2>)1/2 3.707