Structures of a Tetradentate Ferrocenyl Ligand and Its Oxorhenium(V) Complex in Solution and in the Solid State

The novel ferrocenyl ligand rac-1,6-diferrocenyl-N,N‘-bis(2-hydroxypropyl)-2,5-diazahexane (1, H2L) was synthesized from ferrocenylcarboxaldehyde and ethylenediamine followed by the reduction of the Schiff base with LiAlH4 and subsequent N-alkylation with 1,2-propyleneoxide. The dianion of H2L react...

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Bibliographic Details
Published in:Inorganic chemistry 2001-03, Vol.40 (6), p.1199-1205
Main Authors: Knoesen, Otto, Wessels, Philippus L, Görls, Helmar, Lotz, Simon
Format: Article
Language:English
Subjects:
Ferrous Compounds - chemistry
Isomerism
Magnetic Resonance Spectroscopy
Metallocenes
Molecular Structure
Organometallic Compounds - chemistry
Rhenium - chemistry
Structure-Activity Relationship
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Summary:The novel ferrocenyl ligand rac-1,6-diferrocenyl-N,N‘-bis(2-hydroxypropyl)-2,5-diazahexane (1, H2L) was synthesized from ferrocenylcarboxaldehyde and ethylenediamine followed by the reduction of the Schiff base with LiAlH4 and subsequent N-alkylation with 1,2-propyleneoxide. The dianion of H2L reacted with [ReO(PPh3)2Cl3], and the product was treated with NH4PF6 to afford the complex [ReO(L-N 2 O 2 )PPh3]PF6 (2). Both the ferrocenyl ligand and the complex were characterized in solution by NMR spectroscopy and in the solid state by single-crystal X-ray diffraction studies. NMR investigations reveal two solvent-dependent isomers for the ferrocenyl ligand in solution of which the major form is the more ordered one. The cation of 2 displays a nonsymmetrically coordinated N 2 O 2 ligand.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic000746y