Radial (tetracyclopentadienyl)cyclobutadiene pentametals

Authors :: Eichberg, Michael J.
Kayser, Bernd
Leonard, Philip W.
Miljanić, Ognjen Š.
Timofeeva, Tatiana V.
Vollhardt, K. Peter C.
Whitener, Glenn D.
Yakovenko, Andrey
Yu, Yong
Source :: Inorganica Chimica Acta. Apr2011, Vol. 369 Issue 1, p32-39. 8p.
Publication Year :: 2011
Abstract: Abstract: Radial (tetracyclopentadienyl)cyclobutadiene pentametals have been synthesized by the Pd-catalyzed coupling of cyclopentadienyltin or of (CpM)zinc reagents with (tetraiodocyclobutadiene)iron(tricabonyl). X-ray structural and NMR data reveal that, while these arrays are crowded, the substituents enjoy considerable rotational freedom. The method constitutes a significant complement to currently existing strategies for the construction of persubstituted cyclobutadiene complexes. [Copyright &y& Elsevier]