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

using model chemistry: MP2/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
1 2 no C*V 1Σ

Conformer 1 (CS)

Jump to S1C2
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-25.819864
Energy at 298.15K-25.820295
HF Energy-25.582507
Nuclear repulsion energy26.091944
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 MP2/CEP-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' 3793 3665 422.04      
2 A' 1973 1907 576.02      
3 A' 785 759 14.68      
4 A' 424 410 252.79      
5 A' 389 376 247.24      
6 A" 413 399 21.53      

Unscaled Zero Point Vibrational Energy (zpe) 3888.6 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 3757.5 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 MP2/CEP-31G
ABC
79.58564 0.17751 0.17711

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.171 1.753 0.000
C2 0.000 0.528 0.000
S3 0.062 -1.133 0.000
H4 0.213 2.691 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.23742.89551.0136
C21.23741.66182.1740
S32.89551.66183.8272
H41.01362.17403.8272

picture of Isothiocyanic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 S3 174.173 C2 N1 H4 149.798
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-25.819236
Energy at 298.15K 
HF Energy-25.586084
Nuclear repulsion energy26.139628
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 MP2/CEP-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 Σ 3883 3753 662.41      
2 Σ 2016 1948 589.82      
3 Σ 765 739 36.84      
4 Π 403 389 14.69      
4 Π 403 389 14.69      
5 Π 290i 281i 224.43      
5 Π 290i 281i 224.43      

Unscaled Zero Point Vibrational Energy (zpe) 3444.6 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 3328.6 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 MP2/CEP-31G
B
0.17653

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.754
C2 0.000 0.000 -0.531
S3 0.000 0.000 1.139
H4 0.000 0.000 -2.761

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.22232.89271.0074
C21.22231.67042.2297
S32.89271.67043.9001
H41.00742.22973.9001

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