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All results from a given calculation for HOCN (cyanic acid)

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 CS 1A'
Energy calculated at mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-168.603579
Energy at 298.15K-168.604561
Nuclear repulsion energy58.332515
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 A' 3831 3658 150.84      
2 A' 2425 2315 119.73      
3 A' 1254 1197 92.79      
4 A' 1130 1079 68.82      
5 A' 484 462 15.33      
6 A" 545 520 5.76      

Unscaled Zero Point Vibrational Energy (zpe) 4834.0 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 4615.1 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 mPW1PW91/6-31G(2df,p)
ABC
22.51519 0.35633 0.35078

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.093 1.331 0.000
C2 0.000 0.178 0.000
O3 -0.167 -1.104 0.000
H4 0.688 -1.549 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.15652.44832.9407
C21.15651.29251.8590
O32.44831.29250.9641
H42.94071.85900.9641

picture of cyanic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 O3 177.166 C2 O3 H4 110.083
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 N -0.392      
2 C 0.423      
3 O -0.395      
4 H 0.364      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.289 -3.706 0.000 3.924
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.958 -2.985 0.000
y -2.985 -17.699 0.000
z 0.000 0.000 -16.348
Traceless
 xyz
x 2.065 -2.985 0.000
y -2.985 -2.046 0.000
z 0.000 0.000 -0.019
Polar
3z2-r2-0.038
x2-y22.741
xy-2.985
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.964 -0.017 0.000
y -0.017 4.090 0.000
z 0.000 0.000 1.768


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000