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All results from a given calculation for HNCS (Isothiocyanic acid)

using model chemistry: M06-2X/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C*V 1Σ

Conformer 1 (CS)

Jump to S1C2
Energy calculated at M06-2X/3-21G
 hartrees
Energy at 0K-489.073510
Energy at 298.15K 
HF Energy-489.073510
Nuclear repulsion energy78.540618
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 M06-2X/3-21G
Rotational Constants (cm-1) from geometry optimized at M06-2X/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at M06-2X/3-21G
 hartrees
Energy at 0K-489.073572
Energy at 298.15K-489.074271
HF Energy-489.073572
Nuclear repulsion energy78.479970
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 M06-2X/3-21G
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 3888 3728 783.52      
2 Σ 2236 2144 500.81      
3 Σ 799 766 31.45      
4 Π 537 515 24.57      
4 Π 537 515 24.57      
5 Π 365 350 216.44      
5 Π 365 350 216.44      

Unscaled Zero Point Vibrational Energy (zpe) 4363.5 cm-1
Scaled (by 0.9587) Zero Point Vibrational Energy (zpe) 4183.3 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 M06-2X/3-21G
B
0.18651

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.700
C2 0.000 0.000 -0.526
S3 0.000 0.000 1.110
H4 0.000 0.000 -2.697

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.17422.80990.9970
C21.17421.63572.1712
S32.80991.63573.8069
H40.99702.17123.8069

picture of Isothiocyanic acid state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 S3 180.000 C2 N1 H4 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.767      
2 C 0.164      
3 S 0.201      
4 H 0.402      


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 -4.181 4.181
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.417 0.000 0.000
y 0.000 -25.417 0.000
z 0.000 0.000 -16.063
Traceless
 xyz
x -4.677 0.000 0.000
y 0.000 -4.677 0.000
z 0.000 0.000 9.354
Polar
3z2-r218.707
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 1.671 0.000 0.000
y 0.000 1.671 0.000
z 0.000 0.000 8.038


<r2> (average value of r2) Å2
<r2> 62.800
(<r2>)1/2 7.925