New Ditopic and Tripodal 1,2,4-Triazole- and Tetrazole-Based Ligands for Coordination Chemistry

摘要: The practical synthesis of two new classes polytopic azole-based ligands is reported. the precursor amines was achieved by substitution a leaving group an azide followed reduction with triphenylphosphine and water. Another efficient method employs Mitsunobu coupling phthalimide allowing conversion primary alcohol into amine. triazole tetrazole were obtained cyclization these amine precursors. first family consisted ditopic containing both 1-R-tetrazole 4-R-1,2,4-triazole moieties linked alkyl spacer, white second consists branched three azole cycles to benzene core through ether bonds. Both are suitable for building multidimensional polynuclear coordination assemblies observation thermal spin state crossover behavior iron(II) ions.