Journal article
The homologous series of 1,1'-ferrocenylenebisdihalophosphanes (C5H4PX2)2Fe (X = F, Cl, Br, I): precursors for the first metallocene bridged bisphosphaalkene.



Publication Details
Authors:
Moser, C.; Orthaber, A.; Nieger, M.; Belaj, F.; Pietschnig, R.
Publisher:
Royal Society of ChemistryDO - 10.1039/b604501d
Publication year:
2006
Journal:
Dalton Transactions
Pages range:
3879-3885
Start page:
3879
End page:
3885
ISSN:
1477-9226

Abstract
A facile synthetic access to the homologous series of 1,1'-ferrocenylene bisdihalophosphines Fc'(PX2)2 (X = F, Cl, Br, I; Fc' = 1,1'-ferrocenediyl = ferrocenylene = -C5H4FeC5H4-) is reported. The 31P NMR spectroscopic data of this series suggest a similar electronic interaction of the -PX2 unit with the ferrocene system as in monofunctional ferrocenyldihalophosphines. Crystal structures for Fc'(PCl2)2 and Fc'(PBr2)2 reveal that the nature of the halogen atom within the phosphine unit strongly influences the twist angle of the ferrocene system, while leaving the other structural parameters mostly unaffected. Based on these bisdihalophosphines, a synthetic access to the ferrocene bridged bisphosphaalkene ((C5H4P:C(t-Bu)OTMS)2Fe) is reported. The tert-Bu substituents provide sufficient steric pressure to control the ratio of the formation of the three possible isomers (E/E, E/Z and Z/Z). The Z,Z isomer is almost exclusively formed. [on SciFinder(R)]


Keywords
crystal structure ferrocenylene bisdihalophosphine prepn, dilithioferrocene reaction chloro bisaminophosphine, ferrocenylene bridged bisphosphaalkene prepn, mol structure ferrocenylene bisdihalophosphine prepn


Authors/Editors

Last updated on 2019-25-07 at 16:02