return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B2PLYP=FULL/3-21G

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 B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-488.868694
Energy at 298.15K-488.869017
HF Energy-488.772977
Nuclear repulsion energy78.052860
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 B2PLYP=FULL/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 A' 3803 3621 619.29      
2 A' 2159 2056 431.78      
3 A' 781 744 18.47      
4 A' 511 487 0.92      
5 A' 173 165 292.69      
6 A" 515 490 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 3971.4 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 3780.8 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 B2PLYP=FULL/3-21G
ABC
249.01083 0.18475 0.18461

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.031 1.713 0.000
C2 0.000 0.528 0.000
S3 -0.001 -1.115 0.000
H4 0.235 2.674 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18562.82780.9966
C21.18561.64252.1586
S32.82781.64253.7956
H40.99662.15863.7956

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 178.473 C2 N1 H4 163.082
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-488.868662
Energy at 298.15K 
HF Energy-488.773595
Nuclear repulsion energy78.037297
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 B2PLYP=FULL/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 3832 3648 708.18      
2 Σ 2173 2068 424.51      
3 Σ 776 739 24.46      
4 Π 517 493 0.21      
4 Π 517 493 0.21      
5 Π 115i 109i 224.63      
5 Π 115i 109i 224.63      

Unscaled Zero Point Vibrational Energy (zpe) 3792.9 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 3610.9 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 B2PLYP=FULL/3-21G
B
0.18432

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.711
C2 0.000 0.000 -0.529
S3 0.000 0.000 1.116
H4 0.000 0.000 -2.706

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18272.82760.9941
C21.18271.64482.1769
S32.82761.64483.8217
H40.99412.17693.8217

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