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

using model chemistry: B1B95/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-93.421970
Energy at 298.15K-93.422106
HF Energy-93.421970
Nuclear repulsion energy24.097687
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/Def2TZVPP
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 3467 3467 64.97 26.29 0.21 0.35
2 Σ 2229 2229 1.66 49.43 0.13 0.24
3 Π 776 776 36.26 0.40 0.75 0.86
3 Π 776 776 36.26 0.40 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3623.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3623.9 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 B1B95/Def2TZVPP
B
1.50673

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/Def2TZVPP

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 -1.561
N3 0.000 0.000 0.648

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06511.1433
H21.06512.2084
N31.14332.2084

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/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.197      
2 H 0.214      
3 N -0.018      


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 -3.008 3.008
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.663 0.000 0.000
y 0.000 -11.663 0.000
z 0.000 0.000 -9.684
Traceless
 xyz
x -0.990 0.000 0.000
y 0.000 -0.990 0.000
z 0.000 0.000 1.979
Polar
3z2-r23.959
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 1.694 0.000 0.000
y 0.000 1.694 0.000
z 0.000 0.000 3.222


<r2> (average value of r2) Å2
<r2> 13.719
(<r2>)1/2 3.704