Research speed reading in 2021. Chemical research careers are more diverse than they might first appear, as there are many different reasons to conduct research and many possible environments. 7143-01-3, Name is Methanesulfonic anhydride, belongs to thiazines compound, is a common compound. In a pantent, author is Yennawar, Hemant P., once mentioned the new application about 7143-01-3, Computed Properties of https://www.ambeed.com/products/7143-01-3.html.
Crystal structures of two 2,3-diary1-2,3-dihydro-4H1,3-benzothiazin-4-ones
The syntheses and crystal structures of 2,3-bis[3-(trifluoromethyl)phenyl]-2,3dihydro-4H-1,3-benzothiazin-4-one (di-m-CF3; C22H13F6NOS) (1) and 2,3-bis(4-methylphenyl)-2,3-dihydro-4H-1,3-benzothiazin-4-one (di-p-CH3; C22H9NOS) (2) are reported. Each structure is racemic: the asymmetric unit of 2 consists of two molecules. In both 1 and 2, the six-membered 1,3-thiazine ring is close to an envelope conformation with the chiral C atom forming the flap. In 1, the 2-aryl group is pseudo-equatorial, while in 2 it is pseudo-axial. In 1, the pendant aryl rings form a V shape with an inter-centroid distance of 3.938 (3) A and an acute dihedral angle of 48.3 (2) between them. Both CF3 groups are disordered over two orientations in 0.687 (19):0.313 (19) and 0.667 (16):0.33 (16) ratios. In each of the independent molecules of 2, the aryl rings are almost orthogonal to each other [dihedral angles = 85.50 (12) and 86.07 (11) I. In both structures, the chiral C atom and the 0 atoms participate in C-H center dot center dot center dot O-type hydrogen bonding between symmetry-related molecules of 1 or the independent enantiomers in 2, forming chains along the c-axis direction in 1 and the b-axis direction in 2. Additionally, in 1, pi-pi contacts of both face-to-face and edge-to-face type, as well as pi-H center dot center dot center dot O and pi-H center dot center dot center dot F interactions are observed. In 2, a racemic mixture of molecules forms layers in the ac plane linked by weak pi-pi and C-H center dot center dot center dot pi interactions.
The proportionality constant is the rate constant for the particular unimolecular reaction. You can get involved in discussing the latest developments in this exciting area about 7143-01-3. Computed Properties of https://www.ambeed.com/products/7143-01-3.html.
Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem