Synthesis of η1 and η5 complexes of samarium(II) with benzophospholyl ligands

Add time:07/29/2019    Source:sciencedirect.com

Reaction of bis(cyclopentadienyl)-2,3-dimethylzirconaindole, obtained by addition of 2-butyne to benzynezirconocene, with PCl3, affords 1-chloro-2,3-dimethylphosphindole (1-chloro 2,3-dimethylbenzophosphole in a one-pot reaction and in moderate yield. Treatment of this compound with potassium and subsequent reaction with [SmI2(THF)2] afforded bis(η5-2,3-dimethylphosphindolyl) bis(tetrahydrofuran)samarium. Treatment of the PP bonded bis(dibenzophospholyl with Sm metal activated by HgCl2 also affords a complex of SmII that was shown to be bis(η1-dibenzophospholyl tetrakis(tetrahydrofuran)samarium, a σ-Sm phosphide complex. Both complexes were analysed by X-ray crystallography.

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