Mechanochemical and solution preparation of the coordination polymers Ag[N(CH2CH2)3N]2[CH3COO]·5H2O and Zn[N(CH2CH2)3N]Cl2

Abstract

The coordination polymer Ag[N(CH₂CH₂)₃N]₂[CH₃COO]·5H₂O has been obtained by co-grinding in the solid state and in the air of a stoichiometric amount of silver acetate and of [N(CH₂CH₂)₃N]. Single crystals suitable for X-ray diffraction have been obtained from a water–methanol solution and used to compare calculated and experimental X-ray powder diffractograms. When ZnCl₂ is used instead of AgCH₃COO in the equimolar reaction with [N(CH₂CH₂)₃N], the solution and solid-state treatments afford different products. Single crystals of the Zn-based coordination polymer Zn[N(CH₂CH₂)₃N]Cl₂ have been obtained by layering a solution of ZnCl₂ in methanol over a solution of [N(CH₂CH₂)₃N] in CH₂Cl₂. The product of the co-grinding, identified only on the basis of X-ray powder diffraction, converts, on prolonged grinding, into the crystalline material obtained from the reaction in solution, namely anhydrous Zn[N(CH₂CH₂)₃N]Cl₂.