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

using model chemistry: CCSD(T)=FULL/cc-pVTZ

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 CCSD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-491.088976
Energy at 298.15K-491.089723
HF Energy-490.462517
Nuclear repulsion energy79.709487
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 CCSD(T)=FULL/cc-pVTZ
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' 3717 3561        
2 A' 2040 1954        
3 A' 874 837        
4 A' 621 595        
5 A' 454 435        
6 A" 496 475        

Unscaled Zero Point Vibrational Energy (zpe) 4101.0 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 3928.8 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 CCSD(T)=FULL/cc-pVTZ
ABC
35.60232 0.19542 0.19435

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.150 1.691 0.000
C2 0.000 0.497 0.000
S3 0.033 -1.079 0.000
H4 0.515 2.441 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.20422.77611.0019
C21.20421.57562.0114
S32.77611.57563.5524
H41.00192.01143.5524

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 174.069 C2 N1 H4 131.285
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at CCSD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-491.085618
Energy at 298.15K 
HF Energy-490.461468
Nuclear repulsion energy79.723559
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 CCSD(T)=FULL/cc-pVTZ
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 3919 3754        
2 Σ 2153 2063        
3 Σ 851 815        
4 Π 490 469        
4 Π 490 469        
5 Π 419i 402i        
5 Π 419i 402i        

Unscaled Zero Point Vibrational Energy (zpe) 3531.7 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 3383.4 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 CCSD(T)=FULL/cc-pVTZ
B
0.19289

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.678
C2 0.000 0.000 -0.500
S3 0.000 0.000 1.089
H4 0.000 0.000 -2.667

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.17822.76710.9881
C21.17821.58892.1664
S32.76711.58893.7552
H40.98812.16643.7552

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