Synthesis of ferrocenyldiimine metal carbonyl complexes and an investigation of the Mo adduct encapsulated in cyclodextrin

被引:24
作者
Petrovski, Z
Braga, SS
Rodrigues, SS
Pereira, CCL
Gonçalves, IS
Pillinger, M
Freire, C
Ramao, CC
机构
[1] Univ Nova Lisboa, Inst Tecnol Quim & Biol, P-2781901 Oeiras, Portugal
[2] Univ Aveiro, CICECO, Dept Chem, P-3810193 Aveiro, Portugal
[3] Alfama, Res & Dev Pharmaceut Drugs Ltd, IBET, P-2781901 Oeiras, Portugal
[4] Univ Porto, Fac Ciencias, Dept Quim, REQUIMTE, P-4169007 Oporto, Portugal
关键词
D O I
10.1039/b409961c
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Cr and Mo tetracarbonyl complexes bearing the diimine ligand N, N'-bis(ferrocenylmethylene)ethylenediamine (FcNN) have been prepared from the ligand and M(CO)(6). Two isomeric forms of (FcNN)Mo(CO)(4), corresponding to the cis, cis and cis, trans geometries with respect to the C=N bonds of the free ligand, were shown to exist in a 1:12.5 ratio by H-1 NMR (NOE experiments). By contrast, only the trans, trans isomer is observed for the Cr complex (FcNN)Cr(CO)(4). The compounds (FcNN)M(CO)(4) show ferrocene-based irreversible oxidation processes that lead to the deposition of a film at the electrode surface. (FcNN)Mo(CO)(4) was immobilised in permethylated beta-CD (TRIMEB) by addition of the guest to a solution of TRIMEB in dichloromethane. Removal of the solvent led to the isolation of an inclusion compound with a 2 : 1 host : guest stoichiometry, as evidenced by powder X-ray diffraction, thermogravimetric analysis, FTIR and C-13 CP MAS NMR spectroscopy. The electrochemical properties of (FcNN)Mo(CO)(4) upon encapsulation are discussed.
引用
收藏
页码:347 / 354
页数:8
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