Proton Affinity in the Chemistry of Beta-Octamolybdate: HPLC-ICP-AES, NMR and Structural Studies

• Published in: Molecules (Basel, Switzerland) Vol. 27; no. 23; p. 8368
• Main Authors: Volchek, Victoria V, Kompankov, Nikolay B, Sokolov, Maxim N, Abramov, Pavel A
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 30.11.2022; MDPI
• Subjects: Affinity; Atomic emission spectroscopy; Catalysis; Chemical synthesis; Chemistry; chromatography; Crystal structure; Crystallography, X-Ray; Electron transport; Emission analysis; High performance liquid chromatography; Inductively coupled plasma; Ligands; Liquid chromatography; Magnetic Resonance Spectroscopy; Metals; Molybdenum; Molybdenum - chemistry; NMR; octamolybdate; Polymers; Polyoxometallates; proton transfer; Protonation; Protons; Single crystals; structural analysis; X-ray diffraction; United States; Russia; NMR; proton transfer; structural analysis; octamolybdate; chromatography
• ISSN: 1420-3049; 1420-3049
• DOI: 10.3390/molecules27238368

The affinity of [β-Mo O ] toward different proton sources has been studied in various conditions. The proposed sites for proton coordination were highlighted with single crystal X-ray diffraction (SCXRD) analysis of (Bu N) [β-{Ag(py-NH )Mo O ]}] ( ) and from analysis of reported structures. Structural rearrangement of [β-Mo O ] as a direct response to protonation was studied in solution with Mo NMR and HPLC-ICP-AES techniques. A new type of proton transfer reaction between (Bu N) [β-Mo O ] and (Bu N) H [V O ] in DMSO results in both polyoxometalates transformation into [V Mo O ] , which was confirmed by the Mo, V NMR and HPLC-ICP-AES techniques. The same type of reaction with [H SiW O ] in DMSO leads to metal redistribution with formation of [W Mo O ] .