Heteroatom-Bridged Carba[2]ferrocenophanes with a Surprising Chemical Shift Pattern of Cp Protons
Ahmadreza Nezamzadeh,
Jianfeng Zhu,
Jens Müller
Abstract:[2]Ferrocenophanes bridged by a carbon and a heteroatom
were targeted
in the hope that such an asymmetric bridge gives rise to monomers
suitable for ring-opening polymerization. Three strained sandwich
compounds with bridging C–Si (13
SiMe2
), C–P (13
PPh
),
or C–B (13
BMes
) moieties
were prepared using a lithium–bromine exchange followed by
a common salt-metathesis reaction. Single-crystal X-ray structural
analyses revealed an increase of the degree of Cp ring tilting, commonly
expressed as the α angle, f… Show more
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