Molybdenum Complexes Supported by PN3P Pincer Ligands: Synthesis, Characterization, and Application to Synthetic Nitrogen Fixation. Issue 47 (7th December 2018)

• Record Type: Journal Article
• Authors: Stucke, Nadja; Krahmer, Jan; Näther, Christian; Tuczek, Felix
• Is Part Of: European journal of inorganic chemistry. Issue 47(2018)
• Page Start: 5108
• Page End: 5116
• Publication Date: 2018-12-07
• Subjects: Nitrogen fixation -- Pincer ligands -- N2‐to‐NH3 transformation -- Molybdenum complexes -- Catalysis; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201801194
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : Three PN 3 P pincer ligands with a central pyridine ring, amine groups in the ligand backbone and different substituents at the terminal phosphine donors are synthesized and coordinated to molybdenum(III) precursors. Conversion of the resulting Mo III compounds to dinitrogen complexes is investigated and compared to the literature‐known complex trans ‐[Mo(N2 )2 (PMe2 Ph)(PNP t Bu )] supported by a classic PNP pincer ligand. The difference between PN 3 P ligands terminated by di‐ tert ‐butyl and diphenyl substituents regarding the synthesis and the properties of corresponding Mo 0 dinitrogen complexes is elucidated. Application of the synthesized Mo 0 ‐ and Mo III ‐PN 3 P complexes in the conversion of dinitrogen to ammonia reveals a strong influence of the terminal substituents and the atoms in the backbone of the pincer ligand on the catalytic activity. Abstract : Three PN 3 P pincer ligands with different substituents at the terminal phosphine donors are synthesized and coordinated to Mo III precursors. Conversion of the resulting Mo III compounds to dinitrogen complexes and application of these systems in synthetic nitrogen fixation are investigated. The influence of the different phosphine donors regarding the conversion of N2 to NH3 in homogeneous solution is elucidated.