Three isostructural solvates of a tetrahydro-furochromenone derivative

摘要

Isostructurality is more likely to occur in multicomponent systems. In this context, three closely related solvates were crystallized, namely, benzene (C_27H_21BrO_6·C_6H_6), toluene (C_27H_21BrO_6·C_7H_8) and xylene (C_27H_21BrO_6·-C_8H_10) with methyl 3a-acetyl-3-(4-bromophenyl)-4-oxo-l-phenyl-3,3a,4,9b-tetrahydro-1H-furo[3,4-c]chromene-l-carboxylate, and their crystal structures determined. All three structures belong to the same space group (P1) and display similar unit-cell dimensions and conformations, as well as isostructural crystal packings. The isostructurality is confirmed by unit-cell and isostructural similarity indices. In each solvate, weak C-H ??? O and C-H ??? n interactions extend the molecules into two-dimensional networks, which are further linked by C-H ??? Br and Br ??? Br interactions into three-dimensional networks. The conformation of the core molecule is predominantly responsible for governing the isostructurality.