Synthesis and characterization of 3-methyl-6-[(propynyloxy)methyl]-1,4-dioxane-2,5-dione

Abstract

The number of known asymmetrically substituted hemilactides, important precursors for obtaining regular derivatives of polylactide polymers, is still limited and structural characterization of most of them is incomplete. In the title racemic 1,4-dioxane-2,5-dione derivative, C 9 H 10 O 5 , the hemilactide heterocycle exhibits a twist-boat conformation. The bulkier propynyloxymethyl group is in an axial position with a gauche conformation for the CH 2 -O-CH 2 -C segment. In the crystal, molecules are linked by pairs of C-HÁ Á ÁO hydrogen bonds, forming inversion dimers. The dimers are linked by further C-HÁ Á ÁO contacts, forming a three-dimensional structure.

Bis(benzoxazol-2-yl)methanides in main group organometallic syntheses and enquiry-based education

“…[51] Since its introduction, the MetalJet X-ray source has been used in single crystal X-ray diffraction studies involving all kinds of different compounds. From small organic molecules [59][60][61][62][63][64] to proteins, [65][66][67][68] polymers [69,70] and metal organic frameworks. [71] Furthermore inorganic compounds containing p-block elements [72,73] as well as d-metal complexes [74][75][76][77][78][79][80] have been investigated.…”