Neutral Mo6Q8-clusters with terminal phosphane ligands – a route to water-soluble molecular units of Chevrel phases. (11th January 2022)

• Record Type: Journal Article
• Authors: Novikova, Evgeniya D.; Gassan, Alena D.; Ivanov, Anton A.; Vorotnikov, Yuri A.; Shestopalov, Michael A.
• Is Part Of: New journal of chemistry. Volume 46:Number 5(2022)
• Page Start: 2218
• Page End: 2223
• Publication Date: 2022-01-11
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d1nj05802a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Neutral clusters [{Mo6 Q8 }(Ph2 PC2 H4 COOH)6 ] (Q = S or Se) readily dissolve in slightly alkaline water forming a highly stable solution. Compounds are redox-active and demonstrate absorbance in all major regions of the spectra – UV, visible and NIR. Abstract : Despite the numerous studies on Chevrel phases, their building blocks – molecular compounds containing the {Mo6 Q8 } cluster core – are hardly presented in the literature. Here we present rare examples of phosphane molybdenum chalcogenide clusters – [{Mo6 Q8 }(Ph2 PC2 H4 COOH)6 ] (Q = S or Se) – which have been obtained by the direct interaction of (Bu4 N)2 [{Mo6 Cl8 }Cl6 ] with in situ generated Na2 Q in the presence of a phosphane pro-ligand. Crystal structure determination has confirmed the formation of a homoleptic six-substituted neutral complex. The redox and optical properties were also studied. Due to the presence of six carboxylate groups in phosphane ligands, both clusters form a stable solution in alkaline water. Besides the known K7 [{Mo6 Se8 }(CN)6 ]·8H2 O, the compounds obtained here are the only examples of water-soluble complexes of such types.