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Dalton Transactions

The international journal for inorganic, organometallic and bioinorganic chemistry



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Paper

Dalton Trans., 2009, 1714 - 1720, DOI: 10.1039/b821954k

Synthesis and characterization of manganese and iron complexes supported by multidentate [N2P2] ligands

Wayne A. Chomitz and John Arnold

The coordination chemistry of mono- and divalent manganese and iron complexes supported by the monoanionic multidentate ligands, [N2P2] (where [N2P2] = tBuN(-)SiMe2N(CH2CH2PiPr2)2) and [N2P2tolyl] (where [N2P2tolyl] = MeC6H4N(-)SiMe2(CH2CH2PiPr2)2) is presented. The Mn(II) and Fe(II) halide complexes [N2P2]MnCl ( 1) and [N2P2]FeCl ( 2) serve as precursors to the alkyl and hydride species [N2P2]MnMe ( 3), [N2P2]FeMe ( 4), [N2P2]FeCH2SiMe3 ( 5), and ([N2P2]Mn)2(-H)2 ( 6). Reduction of 1 and 2 results in the formation of the new bridging dinitrogen complexes ([N2P2]Mn)2(-N2) ( 7) and ([N2P2]Fe)2(-N2) ( 8), respectively. Upon exposure to vacuum, N2 is abstracted from 8, resulting in the observed Fe(I) complex, [N2P2]Fe ( 9). The new Fe(II) halide complex [N2P2tolyl]FeCl ( 10) was isolated following the substitution of [N2P2tolyl] for [N2P2]. Reduction of 10 in the presence of N2 resulted in the formation of the dinitrogen free adduct [N2P2tolyl]Fe ( 11).

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