Synthesis and Characterization of a Stable Organolead(II) Compound:  Bis[2-(N,N-dimethylaminomethyl)ferrocenyl]lead

Synthesis and Characterization of a Stable Organolead(II) Compound:  Bis[2-(N,N-dimethylaminomethyl)ferrocenyl]lead

The reaction of {C,N-[Fe(η5-C5H5)(η5-C5H3(CH2NMe2)-2)]}Li, [FcN]Li, with PbCl2 yields the new stable tetracoordinated diorganolead(II) compound [FcN]2Pb, 1, as a mixture of two diastereomers. In the solid state only the meso-diastereomer exists, which crystallizes in two polymorphs, P21/c and C2/c....

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Veröffentlicht in:Organometallics 2000-04, Vol.19 (7), p.1438-1441
Hauptverfasser: Seidel, Naka, Jacob, Klaus, van der Zeijden, Adolphus A. H, Menge, Heike, Merzweiler, Kurt, Wagner, Christoph
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container_end_page 1441
container_issue 7
container_start_page 1438
container_title Organometallics
container_volume 19
creator Seidel, Naka
Jacob, Klaus
van der Zeijden, Adolphus A. H
Menge, Heike
Merzweiler, Kurt
Wagner, Christoph
description The reaction of {C,N-[Fe(η5-C5H5)(η5-C5H3(CH2NMe2)-2)]}Li, [FcN]Li, with PbCl2 yields the new stable tetracoordinated diorganolead(II) compound [FcN]2Pb, 1, as a mixture of two diastereomers. In the solid state only the meso-diastereomer exists, which crystallizes in two polymorphs, P21/c and C2/c. The ratio of meso/rac-diastereomers in solution is solvent- and temperature-dependent, consistent with an intermolecular exchange between diastereomers. This is the very first observation of such an exchange for lead(II) compounds. An intramolecular exchange process is responsible for equivalency of both FcN groups in solution. The NMR measurements of 1 revealed the authentic spectroscopical data:  13C−207Pb coupling constants in solid-state 13C NMR spectra.
doi_str_mv 10.1021/om990614g
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title Synthesis and Characterization of a Stable Organolead(II) Compound:  Bis[2-(N,N-dimethylaminomethyl)ferrocenyl]lead
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