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DOI: 10.1039/A907973D (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1999, 4299-4302

Synthesis and characterization of pentakis(dimethylphosphanyl)cymantrene [Mn{C5(PMe2)5}(CO)3], the first cyclopentadienyl complex with five phosphanyl substituents[hair space]†

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Karlheinz Sünkel, Cornelia Stramm and Sabine Soheili

Abstract

Treatment of the highly reactive [Mn(C5Cl3Li2)(CO)3] with PPh2Cl or PEt2Cl gave the 1,3-bis(phosphanyl)cymantrenes [Mn{C5Cl3(PR2)2}(CO)3] (R = Ph, 1 or Et 2). The stepwise repeated reaction of [Mn(C5Br5)(CO)3] with nBuLi and PMe2Cl yielded a 4∶1 mixture of [Mn{C5H(PMe2)4}(CO)3] 3 and [Mn{C5(PMe2)5}(CO)3] 4, from which the latter can be isolated in 10% yield. A structure determination of 4 shows a planar cyclopentadienyl ring with a “paddle wheel” conformation of the five PMe2 substituents.

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