The study reveals a new platinum macrocycle formed through transmetallating reactions, suggesting intriguing bonding interactions.
Abstract A novel NHC-mercury(II) transmetallating reagent [Hg(L)₂][BF₄]₂ (3), obtained from the proligand L·HBF4 (1), lead upon reaction with [Pt(Cl)₂(cod)] to a novel platinum(II) diplatinamacrocycle of molecular formulae {[Pt(Cl)(L)][BF₄]}₂ (4) which structure was ascertained by single-crystal X-ray diffraction analysis. Reaction of the proligand L·HBF4 (1) with [Pt(PPh₃)₄] resulted in oxidative addition of the C-H bond of the benzimidazolium ring to Pt(0) providing a mononuclear platinum(II) hydride complex trans-[Pt(H)(L)(PPh₃)₂]BF₄ (5) easily hydrolysed.
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Moussa et al. (2025) studied this question.
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