Heterodinuclear bridging carbido and phosphoniocarbyne complexes
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The sequential treatment of [W(≡CBr)(CO) 2{HB(pzMe 2) 3}] (pz = pyrazol-1-yl) with nBuLi and [NiCl 2(PEt 3) 2] initially affords the bridging carbido complex [WNi(μ-C)(CO) 2(PEt 3) 2Cl{HB(pzMe 2) 3}], which is however unstable and isomerizes cleanly to the bridging phosphoniocarbyne complex [WNi(μ-CPEt 3)(CO) 2(PEt 3)Cl{HB(pzMe 2) 3}].
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Organometallics