As a society publisher, everything we do is to support the scientific community – so you can trust us to always act in your best interests, and get your work the international recognition that it deserves. , Formula: https://www.ambeed.com/products/7143-01-3.html, 7143-01-3, Name is Methanesulfonic anhydride, molecular formula is C2H6O5S2, belongs to thiazines compound. In a document, author is Yennawar, Hemant P., introduce the new discover.
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.
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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem