Complete investigation on the synthesis of [Ru(bpydip)Cl2]: the nonformation of cis isomer

• Published in: Tetrahedron letters Vol. 52; no. 39; pp. 5043 - 5046
• Main Authors: da Silva, Alan Patrick, de Freitas Gauze, Gisele, Matias, Tiago Araújo, de Souza, Vagner Roberto, de Castro Rozada, Thiago, Basso, Ernani Abicht
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 28-09-2011; Elsevier
• Subjects: Chemistry; Complexation; Exact sciences and technology; Heterocyclic compounds; Heterocyclic compounds with only one n hetero atom and condensed derivatives; Isomers; Ligands; Organic chemistry; Preparations and properties; Ruthenium; Ruthenium complexes; Schiff bases; Stability; Synthesis (chemistry); Tetradentate Schiff base; Tetrahedrons; Theoretical calculations; Transition states; Transition states; Ruthenium complexes; Theoretical calculations; Tetradentate Schiff base; Nitrogen heterocycle; Theoretical study; Transition metal Complexes; Imine; Pyridine derivatives; Cis stereoisomer; Schiff base; Transition state; Platinoid Complexes; Tetradentate ligand; Chemical synthesis; Ruthenium complex
• ISSN: 0040-4039; 1873-3581
• DOI: 10.1016/j.tetlet.2011.07.086

Complexation between the Schiff base N4-tetradentate N,N′-bis(7-methyl-2-pyridylmethylene)-1,3-diiminopropane (bpydip) and ion Ru(II) occurs only in trans geometry. However, it is known that the most complex of these ligands with ruthenium present predominantly cis geometry. In order to clarify the effects that drive the formation of the complex [Ru(bpydip)Cl2], we performed a new experimental study of the reaction and a complete theoretical investigation of their transition states. The results showed that nonformation of the cis isomer could be explained by the difference in relative stability of the reaction products and the transition states proposed.