title: A new polymeric alkyl/alkoxide magnesium-sodium inverse crown complex.
abstract: Poly[bis(μ(3)-trimethylsilylmethanolato)tetrakis(μ(2)-trimethylsilylmethyl)dimagnesiumdisodium], [Na(2)Mg(2)(C(4)H(11)OSi)(2)(C(4)H(11)Si)(4)](n), was obtained from the controlled exposure to oxygen of the unsolvated sodium magnesate [NaMg(CH(2)SiMe)(3)](n). Exhibiting a centrosymmetric (Z' = 1/2) dimeric core of a heterobimetallic eight-membered cationic ring, hosting two alkoxide ligands at its core, the title compound forms a two-dimensional coordination polymer in the crystallographic bc plane through Na···Me contacts. These contacts from Na to formally uncharged groups are only 0.06 longer than those between Na and the formally charged CH(2)R anions. The coordination polymers stack along the a direction to give a layer structure with alternating hydrophobic and hydrophilic regions.
authors: Department of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland. sharon.baillie@strath.ac.uk
authors: Sharon E
authors: SE
authors: Baillie
authors: Victoria L
authors: VL
authors: Blair
authors: Eva
authors: E
authors: Hevia
authors: Alan R
authors: AR
authors: Kennedy