return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for NHCHSH (Methanimidothioic acid)

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-492.017421
Energy at 298.15K-492.021157
HF Energy-491.586119
Nuclear repulsion energy94.140779
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 MP2/6-311G*
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' 3516 3342 1.70 176.96 0.33 0.50
2 A' 3108 2954 30.77 114.16 0.38 0.55
3 A' 2687 2554 0.29 109.55 0.33 0.50
4 A' 1640 1559 113.42 7.42 0.26 0.41
5 A' 1417 1347 23.49 7.39 0.10 0.18
6 A' 1241 1179 27.61 14.44 0.59 0.74
7 A' 965 917 53.00 4.45 0.61 0.75
8 A' 743 706 74.70 2.53 0.21 0.35
9 A' 443 421 20.98 2.51 0.48 0.65
10 A" 1072 1019 3.43 0.62 0.75 0.86
11 A" 752 714 90.31 3.00 0.75 0.86
12 A" 389 369 49.94 4.55 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8986.2 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 8539.6 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 MP2/6-311G*
ABC
1.89954 0.20304 0.18343

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.252 1.027 0.000
C2 0.000 0.771 0.000
S3 -0.622 -0.871 0.000
H4 1.394 2.036 0.000
H5 -0.805 1.515 0.000
H6 0.601 -1.429 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4 H5 H6
N11.27772.66691.01952.11382.5400
C21.27771.75621.88241.09552.2808
S32.66691.75623.53792.39251.3448
H41.01951.88243.53792.26013.5544
H52.11381.09552.39252.26013.2620
H62.54002.28081.34483.55443.2620

picture of Methanimidothioic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 S3 122.269 N1 C2 H5 125.755
C2 N1 H4 109.549 C2 S3 H6 93.760
S3 C2 H5 111.975
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability