A novel two-dimensional organostannoxane coordination network promoted by phenazine: Synthesis, characterization and X-ray structure of 2∞{[n-Bu2(μ-OH)SnOSn(μ-η2-O3SCF3)n-Bu2]2[n-Bu2(η1-O3SCF3)SnOSn(μ-OH)n-Bu2]2}2∞{[n-Bu2(μ-OH)SnOSn(μ-η2-O3SCF3)n-Bu2]2[n-

Reaction of the dimeric hydroxo di-n-butylstannane trifluoromethanesulfonato complex [n-Bu2Sn(μ-OH)(H2O)0.5(η1-O3SCF3)]2 (1) with phenazine (C12H8N2, Phz) (2) in dichloromethane at room temperature in a 1:3 molar ratio yielded the novel two-dimensional organometallic coordination polymer 2∞{[n-Bu2(μ-OH)SnOSn(μ-η2-O3SCF3)n-Bu2]2[n-Bu2(μ-OH)SnOSn(η1-O3SCF3)n-Bu2]2}2∞{[n-Bu2(μ-OH)SnOSn(μ-η2-O3SCF3)n-Bu2]2[n-Bu2(μ-OH)SnOSn(η1-O3SCF3)n-Bu2]2} (3), together with the phenazinium trifluoromethanesulfonate salt [C12H9N2]+ [CF3SO3]−, crystallographically isolated in two different structural arrangements, free 4 and in π–π aromatic stacking interaction with independent intercalated non-protonated phenazine molecules 5. Organometallic coordination polymer 3 consists of an infinite one-dimensional chain composed of tetrameric hydroxo tetra-n-butyldistannoxane units bridged by bidendate trifluoromethanesulfonate ligands, (μ-η2-O3SCF3). The formation of weak intermolecular interactions between nearest-neighbour chains through the pseudo-terminal trifluoromethanesulfonate ligands (η1-O3SCF3) gives rise to the expansion of an unexpected supramolecular two-dimensional network. The re-crystallisation of 3 in methanol leads to the polymorphic structure 2∞{[n-Bu2(μ-OH)SnOSn(μ-η2-OSO2CF3)n-Bu2]}2∞{[n-Bu2(μ-OH)SnOSn(μ-η2-OSO2CF3)n-Bu2]} (3b).

Graphical abstractThe title compound consists of an infinite one-dimensional chain composed of tetrameric hydroxo tetra-n-butyldistannoxane units bridged by bidendate trifluoromethanesulfonate ligands, (μ-η2-O3SCF3). The formation of intermolecular hydrogen bonding and long Sn–O distance interactions between nearest-neighbour chains through pseudo-terminal trifluoromethanesulfonate ligands (η1-O3SCF3) gives rise to the expansion of a novel and unexpected two-dimensional supramolecular network.Figure optionsDownload full-size imageDownload as PowerPoint slide