A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 139-65-1, Name is 4,4-Thiodianiline, molecular formula is C12H12N2S. In an article, author is Sebbar, N. K.,once mentioned of 139-65-1, Safety of 4,4-Thiodianiline.
Crystal structure of 4-benzyl-2H-benzo[b][1,4] thiazin-3(4H)-one
In the title compound, C15H13NOS, the thiazine ring adopts a twisted boat conformation and the dihedral angle between the aromatic rings is 86.54 (4)degrees. In the crystal, molecules are linked by weak C-H center dot center dot center dot O interactions, resulting in chains along [010].
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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem