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Synthesis and Characterization of New Germylferrocenyl, Germylferrocenophane and Polymeric Germyleneferrocenylene Systems by Madeli Castruita; Francisco Cervantes-Lee; Jawad S Mahmoud; Yongqiang Zhang; Keith H Pannell is a Chemistry article available to read on EtoBox.

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New germanium-bridged [1]ferrocenophanes Fe(h 5 -C 5 H 4 ) 2 GeClR (1), (R =Me (1a), t-Bu (1b), Ph (1c)) were prepared by the reaction of Fe(h 5 -C 5 H 4 Li) 2 •TMEDA (TMEDA=tetramethylethylenediamine) with the corresponding chlorogermanes, RGeCl 3 (R= Me, t-Bu, Ph). Ring-opening addition of HCl to 1c resulted in the formation of (h 5 -C 5 H 4 )Fe(h 5 -C 5 H 5 )GeCl 2 Ph (2) which was reacted with dilithioferrocene•TMEDA to form Fe(h 5 -C 5 H 4 ) 2 FcPhGe (3). All complexes were characterized by 13 C and 1 H NMR, and the structure of Fe(h 5 -C 5 H 4 ) 2 GeClPh was determined by single-crystal X-ray diffraction analysis and exhibits a dihedral angle between the planes of the cyclopentadienyl rings of 18.4°. Cyclic voltammetric analysis of 1a, 1b, and 1c in CH 2 Cl 2 revealed that each ferrocenophane exhibits a reversible, one-electron oxidation, at a higher oxidation potential than that of ferrocene. The voltammogram of 3 shows two reversible redox processes, one for the ferrocenophane moiety and a second for the pendant ferrocene group. Thermal ring-opening of 3 produced good yields of the corresponding polymer [Fe(h 5 -C 5 H 4 ) 2 FcPhGe] n .

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Author

Madeli Castruita; Francisco Cervantes-Lee; Jawad S Mahmoud; Yongqiang Zhang; Keith H Pannell

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)

Published

2001

Language

EN

Field

Chemistry (Physical Sciences)