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All results from a given calculation for HNCO (Isocyanic acid)

using model chemistry: B3LYP/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/6-31G
 hartrees
Energy at 0K-168.612963
Energy at 298.15K-168.613793
Nuclear repulsion energy58.443123
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/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3828 3683 257.88      
2 A' 2335 2246 516.08      
3 A' 1300 1251 10.25      
4 A' 560 539 35.98      
5 A' 516 497 305.72      
6 A" 559 537 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 4548.9 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 4376.1 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 B3LYP/6-31G
ABC
54.81925 0.35536 0.35307

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.555 -1.345 0.000
N2 0.623 -0.985 0.000
C3 0.000 0.049 0.000
O4 -0.739 0.994 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H10.99902.08793.2758
N20.99901.20702.4022
C32.08791.20701.1997
O43.27582.40221.1997

picture of Isocyanic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 N2 C3 142.156 N2 C3 O4 173.023
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.358      
2 N -0.484      
3 C 0.481      
4 O -0.355      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.651 -1.306 0.000 2.955
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.496 -0.814 0.000
y -0.814 -18.295 0.000
z 0.000 0.000 -16.410
Traceless
 xyz
x 3.857 -0.814 0.000
y -0.814 -3.342 0.000
z 0.000 0.000 -0.515
Polar
3z2-r2-1.029
x2-y24.800
xy-0.814
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.304 -1.628 0.000
y -1.628 3.501 0.000
z 0.000 0.000 1.037


<r2> (average value of r2) Å2
<r2> 36.054
(<r2>)1/2 6.005