(Cyclopentadienyl){(N,N-dimethylaminoethyl)cyclopentadienyl} complexes of zirconium: Crystal structure of [(η5-C5H5)(η5-C5H4CH2CH2NHMe2)ZrCl2]2[ZrCl6]

[(η5-C5H5)ZrCl3] reacts with [C5H4CH2CH2NMe2]Li yielding the coordination polymer [(C5H5)(C5H4CH2CH2NMe2)ZrCl2]n (1) as a brown solid which is very sensitive to moisture. The reaction of 1 with 1.35 equivalent of HCl (methanolic solution) yields pale yellow green crystals of [(η5-C5H5)(η5-C5H4CH2CH2NHMe2)ZrCl2]2[ZrCl6] (2). Compound 2 was fully characterized on the basis of NMR data and X-ray crystal structure analysis. The formation of this product indicates the elimination of C5H4CH2CH2NMe2 as well as C5H5 ligands from the Zr(IV) metal centre.

Graphical abstractThe reaction of the coordination polymer [(C6H5)(C5H4CH2CH2NMe2)ZrCl2]n with methanolic solution of HCl results in elimination of C5H5 and C5H4CH2CH2NMe2 ligands from the Zr(IV) metal centre. Formation of the title compound was established by NMR spectroscopy and X-ray structural analysis.Figure optionsDownload full-size imageDownload as PowerPoint slide