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Reaction of M(CO)6; M = Mo or W with isatin in the presence of triphenylphosphine in THF under reduced pressure gave the tricarbonyl derivatives complexes [M(CO)3(isatH)(PPh3)]. The two complexes were characterized by elemental analysis, infrared, mass and 1H NMR spectroscopy. The spectroscopic studies show that the two complexes exist in fac‐ and mer‐isomers in solutions through exchange the CO group and PPh3. The Uv‐Vis spectra of the complexes in different solvents were studied.
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Khalil et al. (2008) studied this question.
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