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Klein-Hessling, Christian and Sünkel, Karlheinz (2021): Synthesis and Characterization of the Complete Series [(C5H5-n Cl-n)Co(C4Ph4)] (n=1-5). In: Chemistryselect, Vol. 6, No. 28: pp. 7183-7187

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Reflux of a mixture of [CoCl(PPh3)(3)], Tl(C5H4Cl) and PhCCPh in toluene gave [(C5H4Cl)Co(C4Ph4)] in ca. 20 % yield. Deprotonation of this compound by lithium tetramethylpiperidinide (LiTMP) at -30 degrees C in THF, followed by addition of C2Cl6 at -78 degrees C yielded [(C5H3Cl2)Co(C4Ph4)]. By repeating this procedure, the other members of the series [(C5H5-nCln)Co(C4Ph4)] (n=1-5) could be prepared in high yields. The molecular structures of the complexes with n=3-5 were determined by X-ray crystallography.

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