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- W1963954247 abstract "The new ligand 2,6-bis(diphenylphosphino)-N-methylaniline (LH) has been prepared via repeated o-lithiation of lithium N-methyl-N-phenylcarbamate. Reaction of LH with Mo(CO)6 gives [P,N-LH]Mo(CO)4 (1) and (with an excess of Mo(CO)6) [μ-P,N : P′-LH][Mo(CO)4][Mo(CO)5] (3). Reaction of the anion L− with Mo(CO)6 initially gives the carbamoyl complex {[P,C-LC(O)]Mo(CO)4}−Li+ (4), but use of an excess of Mo(CO)6 and extended reaction times results in formation of the binuclear complex {[μ-P,N : P′,N-L][Mo(CO)4]2}−Li+ (5). Complex 5 does not react with oxygen, but treatment with halogen sources (CCl4, Br2, I2) gives [μ-P,N : P′,N-L][μ-X][Mo(CO)3]2 (6, X = Cl, Br, I) via an intermediate formulated as {[μ-P,N : P′,N-L][Mo(CO)4][Mo(CO)3X2]}−Li+ (7). All complexes have been characterized by 13C and 31P NMR spectroscopy. The structure of 6-Br has been confirmed by a single-crystal X-ray diffraction study. The molecule of 6-Br is of approximate Cs symmetry; each molybdenum atom is surrounded by three carbonyl groups, a phosphine, bridging nitrogen and bromine atoms (MoN = 2.18 and MoBr = 2.70 Å av.) and the second molybdenum atom (MoMo = 2.987(2) Å). The metal-metal distance and electron-counting rules indicate the presence of a single metal-metal bond." @default.
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- W1963954247 date "1990-10-01" @default.
- W1963954247 modified "2023-09-23" @default.
- W1963954247 title "Mono- and bi-nuclear molybdenum complexes of 2,6-bis(diphenylphosphino)-N-methylaniline" @default.
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- W1963954247 doi "https://doi.org/10.1016/0022-328x(90)85190-a" @default.
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