Air-stable fluorescent primary phosphine complexes of molybdenum and tungsten. Issue 11 (2nd July 2016)

• Record Type: Journal Article
• Authors: Davies, Laura H.; Wallis, Jennifer F.; Harrington, Ross W.; Waddell, Paul G.; Higham, Lee J.
• Is Part Of: Journal of coordination chemistry. Volume 69:Issue 11/13(2016)
• Page Start: 2069
• Page End: 2080
• Publication Date: 2016-07-02
• Subjects: Air stability -- bodipy -- fluorescence -- molybdenum -- primary phosphines -- tungsten; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2016.1193169
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: Here we report a study on the reactivity of the fluorescent air-stable primary phosphine 8-((4-phosphino)phenyl)-4, 4-dimethyl-1, 3, 5, 7-tetramethyl-2, 6-diethyl-4-bora-3a, 4a-diaza-s-indacene4 with [Mo(CO)6 ], [W(CO)6 ], [Mo(CO)4 (piperidine)] and [W(CO)4 (piperidine)] which yields the mono-phosphine [Mo(CO)5 (4 )]5, [W(CO)5 (4 )]6 and di-phosphine cis -[Mo(CO)4 (4 )2 ] cis -7 and cis -[W(CO)4 (4 )2 ] cis -9 complexes as the predominant products. In addition to the characterization of these complexes by multinuclear NMR and IR spectroscopy, and mass spectrometry, the solid-state structures of6 and cis -7 have also been determined by single-crystal X-ray diffraction. The photophysical properties of the complexes show that the incorporation of the phosphorus ligand has a limited effect on the absorption and emission profile of the Bodipy core and that they retain similar quantum yields to their parent Bodipy dyes. Small quantities of the by-products trans -[Mo(CO)4 (4 )2 ] trans -7, cis -[Mo(CO)4 (piperidine)(4 )] cis -8 and cis -[W(CO)4 (piperidine)(4 )] cis -10 were also isolated and characterized. Abstract :