Synthesis and X-ray crystal structures of two transition metal complexes based on functionalised 1,5-anhydro-2-deoxy-d-galactitol and methyl 2-deoxy-α-d-galactopyranoside
作者:Federico Cisnetti、Régis Guillot、Nada Ibrahim、François Lambert、Michel Thérisod、Clotilde Policar
DOI:10.1016/j.carres.2007.11.031
日期:2008.2
Two new ligands of transition metal cations based on galactose-derived scaffolds were synthesised: 1,5-anhydro-2-deoxy-3,4,6-tri-O-(2-picolyl)-D-galactitol and methyl 2-deoxy-3,4,6-tri-O-(2-picolyl)-alpha-D-galactopyranoside. These ligands permitted the isolation as single crystals of a Co(II) and a Ni(II) complex, respectively. The structures of both complexes were determined by X-ray crystallography
合成了两个基于半乳糖衍生支架的过渡金属阳离子的新配体:1,5-脱水-2-脱氧-3,4,6-三-O-(2-吡啶甲基)-D-半乳糖醇和甲基2-脱氧-3,4,6-三-O-(2-吡啶甲基)-α-D-吡喃半乳糖苷。这些配体允许分离为Co(II)和Ni(II)配合物的单晶。两种配合物的结构均通过X射线晶体学测定,显示出包括糖结合的氧原子的配位球。发现在两种情况下,糖的配体都在复合物的晶体结构中具有高能构象。这些构象包含与糖结合的氧原子的排列,类似于在多元醇-金属和碳水化合物-金属络合物中观察到的排列。