The reaction behavior of [Cp₂Mo₂(CO)₄(μ,η²:²-P₂)] and [Cp′′Ta(CO)₂(η⁴-P₄)] towards hydroxide and tert-butyl nucleophiles
2020
Riedlberger, Felix | Seidl, Michael | Scheer, Manfred
The reaction behavior of [Cp₂Mo₂(CO)₄(μ,η²:²-P₂)] (1) and [Cp′′Ta(CO)₂(η⁴-P₄)] (2), respectively, towards the anions OH⁻ and ᵗBu⁻ are reported. While the reaction of 1 with KOH gives the anionic complex [Cp₂Mo₂(CO)₄(μ-PH₂)]⁻ (3) under a formal phosphorus atom abstraction, reaction with LiᵗBu leads to the alkylation product [Cp₂Mo₂(CO)₄(μ,η²:¹-PPᵗBu)]⁻ (4). The reactions of 2 with [IDipp-H][OH] ([IDipp-H]⁺ = 1,3-bis-(2,6-diisopropyl-phenyl)imidazolium) and LiᵗBu yield [Cp′′Ta(CO)₂{η³-P₄(O)H}]⁻ (5) and [Cp′′Ta(CO)₂(η³-P₄ᵗBu)]⁻ (6), respectively. Compounds 3, 4, 5 and 6 were comprehensively characterized by NMR spectroscopy and X-ray structure analysis.
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