753490-76-5Relevant academic research and scientific papers
Interaction of rhodium(I) bisphosphine complexes with semicarbazones to give orthometallated rhodium(III) complexes
Ezhova,Patrick,James,Ford,Waller
, p. 2707 - 2714 (2003)
Interaction of the cis-[Rh(PR3)2(Solv) 2]PF6 complexes (R = Ar or R3 = Ph 2Me, Solv - solvent) under Ar with semicarbazones bearing a phenyl group on the imine-C atom gives the rhodium(III)-hydrido-bis(phosphine)- orthometallated semicarbazone species [RhH(PR3)2{(o-C 6H4(R′)C=N-N(H)CONH2}]PF6 (R′ = Me or Et), which are characterized generally by elemental analysis, 31P{1H} and 1H NMR spectroscopy, and mass-spectrometry. The PPh3-containing complex with R′ = Me, structurally characterized by X-ray analysis, reveals coordination of the semicarbazone by the ortho-C atom, the imine-N atom, and the amide-carbonyl group. For a semicarbazone containing no Ph group, the rhodium(I) complex [Rh(PR3)2(Et(Me)C=N-N(H)CONH2)]PF6, containing the η2-semicarbazone bonded via the imine-N and carbonyl, is formed. Attempts to hydrogenate the C=N moiety in the complexes or to catalytically hydrogenate the semicarbazones were unsuccessful.
