Solid state structure of p-bromo phenyl 4,5,7-tri-O-benzyl-β-d-glycero-d-talo-septanoside and an analysis of non-covalent interactions

•Synthesis of p-bromophenyl septanoside, as an anomeric mixture is reported.•The β-anomer crystallized and the single crystal X-ray structural determination is performed.•The septanoside adopts a twist-chair conformation, with conformational descriptor O,1TC2,3.•A rich net-work of non-covalent interactions is found to stabilize the crystal lattice.•Apart from O–H⋯O hydrogen bonding, C–H⋯π, C–H⋯Br and aromatic π⋯π non-covalent interactions are observed.

The solid state structure of a new seven-membered sugar oxepane derivative, namely, p-bromo phenyl 4,5,7-tri-O-benzyl-β-d-glycero-d-talo-septanoside is discussed, as determined through single crystal X-ray structural determination and in relation to their conformational features. The molecule adopts twist-chair as the preferred conformation, with conformational descriptor O,1TC2,3. The solid state packing of molecules is governed by a rich network of non-covalent bonding originating from O–H⋯O, C–H⋯π, C–H⋯Br and aromatic π⋯π interactions that stabilize the packing of molecules in the crystal.

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