Cost efficient synthesis of bismuth aminoalkoxides from bismuth oxide:Molecular structure of [Bi_2(mdea)_2(mdeaH)_2](mdeaH_2)_2

摘要

Functional Bi alkoxides were prepared by reaction between the oxide and diols such as N-methyldiethanolamine (mdeaH_2),dietha-nolamine (deaH_2) and triethanolamine (teaH_3) in refluxing toluene in high yields.Similar reactions with polyols without N-donor site lead to oxo species.The derivative obtained with N-methyldiethanolamine was characterised by X-ray diffraction as a dimer [Bi_2(m-dea)_2(mdeaH)_2] associated as chains through H-bonding with neutral diol molecules giving the.title compound.Bismuth is pseudo 7-coordinate.Bi-O bond distances range from 2.150(5) to 3.093(5) A with three short ones,whereas the transannular Bi-N bond distances are 2.737 A av.Thermolysis and hydrolysis reactions are reported.