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All results from a given calculation for HNC (hydrogen isocyanide)

using model chemistry: mPW1PW91/6-31G(2df,p)

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 mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-93.376251
Energy at 298.15K-93.376147
Nuclear repulsion energy24.226223
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 mPW1PW91/6-31G(2df,p)
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 3897 3721 244.78      
2 Σ 2124 2028 57.18      
3 Π 542 517 129.85      
3 Π 542 517 129.85      

Unscaled Zero Point Vibrational Energy (zpe) 3552.1 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 3391.2 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 mPW1PW91/6-31G(2df,p)
B
1.51961

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.738
N2 0.000 0.000 0.429
H3 0.000 0.000 1.424

Atom - Atom Distances (Å)
  C1 N2 H3
C11.16782.1620
N21.16780.9942
H32.16200.9942

picture of hydrogen isocyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.155      
2 N -0.205      
3 H 0.360      


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 2.994 2.994
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.535 0.000 0.000
y 0.000 -11.535 0.000
z 0.000 0.000 -9.945
Traceless
 xyz
x -0.795 0.000 0.000
y 0.000 -0.795 0.000
z 0.000 0.000 1.590
Polar
3z2-r23.181
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 1.590 0.000 0.000
y 0.000 1.590 0.000
z 0.000 0.000 2.975


<r2> (average value of r2) Å2
<r2> 13.462
(<r2>)1/2 3.669