An ortho-rhom-bic polymorph of 2-(1,3,5-di-thia-zinan-5-yl)ethanol or MEA-di-thia-zine.

Substituted triazines are a class of compounds utilized for scavenging and sequestering hydrogen sulfide in oil and gas production operations. The reaction of one of these triazines under field conditions resulted in the formation of the title compound, 2-(1,3,5-di-thia-zinan-5-yl)ethanol, CHNOS, or MEA-di-thia-zine. Polymorphic form I, in space group 4/, was first reported in 2004 and its extended structure displays one-dimensional, helical strands connected through O-H⋯O hydrogen bonds.

A ring-rearrangement metathesis approach toward the synthesis of cyclopenta- and cyclohexa[c]indene systems.

[reaction: see text] A highly efficient synthesis of angularly fused tricyclic enones, cyclopenta- and cyclohexa[c]indene skeletons, has been achieved by the tether-directed ring-rearrangement metathesis sequence starting with readily accessible norbornene derivatives bearing allyl and homoallyl groups at the bridging carbon.