1208005-92-8Relevant academic research and scientific papers
Syntheses, structures and reactivities of rhodium 4,5-diazafluorene derivatives
Jiang, Huiling,Stepowska, Elzbieta,Song, Datong
, p. 2083 - 2089 (2009)
Four rhodium 4,5-diazafluorene derivatives, [RhL(PPh3) 2] (1), [Rh(H)2(LH)(PPh3)2]Cl (2), [Rh(H)2L(PPh3)2] (3) and [Rh(H) 2-(LH)(PPh3)2]OTf (4), have been synthesized and fully characterized by NMR spectroscopy, elemental analysis and single-crystal X-ray diffraction. Compound 1 can be converted into 3 when treated with hydrogen gas. Compound 2 can be converted into 3 when treated with NaH, and the reverse reaction can be achieved by treating 3 with aqueous HCl. The air- and moisture-stable compound 2 is an active catalyst for the hydrogenation of a variety of olefins, including non-terminal ones; the chloride counterion in 2 appears to play a role in the catalytic system. Thus, compound 4, the triflate analogue of 2, is inactive towards olefin hydrogenation.
Reaction of dinuclear rhodium 4,5-diazafluorenyl-9-carboxylate complexes with H2 and CO2
Annibale, Vincent T.,Song, Datong
, p. 2776 - 2783 (2014/06/24)
The reactivity of the dinuclear Rh(I) 4,5-diazafluorenyl-9-carboxylate complex 4 with H2 was explored in an attempt to reduce the trapped CO2-derived moiety. After overnight reaction with H2 the only observed species at room temperature by NMR spectroscopy was the decarboxylated 4,5-diazafluorenyl (L-) Rh(III) complex 1. A series of stepwise stoichiometric reactions with H2, NMR experiments at low temperatures, trapping experiments with added PPh3 or CO2, and 13C-labeling experiments were conducted in an attempt to identify the fates of the CO2-derived portion of 4 and the second Rh center.
