%0 Journal Article
%T Synthesis, Characterization and Crystal Structures of Zwitterionic Triazolato Complexes by Reaction of a Ruthenium Azido Complex with Excess Ethyl Propiolate
%A Chao-Wan Chang
%A Chi-Rung Lee
%A Gene-Hsiang Lee
%J Journal of Crystallization Process and Technology
%P 11-21
%@ 2161-7686
%D 2021
%I Scientific Research Publishing
%R 10.4236/jcpt.2021.102002
%X The synthesis and structures of two novel zwitterionic ruthenium triazolato complexes are reported. The treatment of the ruthenium azido complex [Ru]?N3 (<strong>1</strong>, [Ru] = (¦Ç5-C5H5)(dppe)Ru, dppe = Ph2PCH2CH2PPh2) with an excess of ethyl propiolate in CHCl3 or CH2Cl2 under ambient conditions for 15 days results in the formation of a mixture of the Z- and E-forms of N(1)-bound ruthenium 3-ethylacryl-4-carboxylate-3H-1,2,3-triazolato complexes [Ru]N3(CH=CHCO2Et)C2H(CO2) (<strong><em>Z-3</em></strong>) and (<strong><em>E-3</em></strong>) in a ratio of ca. 5:2. The structures of E-<strong><em>3</em></strong> and Z-<strong><em>3</em></strong> were confirmed by single-crystal X-ray diffraction analysis and fully characterized by 1H, 31P, 13C NMR and IR spectroscopy, mass spectrometry, and elemental analysis. The negatively charged carboxylate moieties of the zwitterionic ruthenium triazolato complexes <em><strong>Z-3</strong></em> and<strong><em> E-3</em></strong> are highly nucleophilic and reactive toward a variety of electrophiles, making <strong><em>Z-3</em></strong> and <em><strong>E-3</strong></em> potential starting materials for the development of biologically active 1,2,3-triazole derivatives.
%K Ethyl Propiolate
%K Ruthenium Azide
%K Ruthenium Triazolate
%K 1
%K 3-Dipolar Cycloaddition
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=114097