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

using model chemistry: CCSD=FULL/6-31G*

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 CCSD=FULL/6-31G*
 hartrees
Energy at 0K-490.831815
Energy at 298.15K-490.832526
HF Energy-490.389640
Nuclear repulsion energy79.507422
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=FULL/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' 3723 3536 251.95      
2 A' 2091 1986 750.34      
3 A' 888 844 6.06      
4 A' 621 590 445.23      
5 A' 445 423 126.46      
6 A" 476 453 1.11      

Unscaled Zero Point Vibrational Energy (zpe) 4122.4 cm-1
Scaled (by 0.9498) Zero Point Vibrational Energy (zpe) 3915.4 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=FULL/6-31G*
ABC
36.46990 0.19444 0.19341

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.162 1.693 0.000
C2 0.000 0.497 0.000
S3 0.041 -1.081 0.000
H4 0.485 2.467 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.20652.78141.0088
C21.20651.57902.0283
S32.78141.57903.5757
H41.00882.02833.5757

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 173.746 C2 N1 H4 132.377
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at CCSD=FULL/6-31G*
 hartrees
Energy at 0K-490.828444
Energy at 298.15K 
HF Energy-490.389119
Nuclear repulsion energy79.514520
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=FULL/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 Σ 3927 3730 743.20      
2 Σ 2222 2111 714.59      
3 Σ 858 815 49.09      
4 Π 473 449 5.59      
4 Π 473 449 5.59      
5 Π 432i 411i 188.77      
5 Π 432i 411i 188.77      

Unscaled Zero Point Vibrational Energy (zpe) 3543.5 cm-1
Scaled (by 0.9498) Zero Point Vibrational Energy (zpe) 3365.6 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 CCSD=FULL/6-31G*
B
0.19194

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.682
C2 0.000 0.000 -0.502
S3 0.000 0.000 1.091
H4 0.000 0.000 -2.678

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18012.77330.9961
C21.18011.59322.1762
S32.77331.59323.7694
H40.99612.17623.7694

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