Redox reactions via outer sphere charge transfer complexation: the interaction of ferrocenes with σ- and π-type acceptors
摘要:
Decamethylferrocene Cp-2*,Fe. ferrocene (Cp2Fe), 1,1'-dimethylferrocene. ((MeCP)(2)Fe), and 1,2-diferrocenylethane (Fc(2)C(2)H(4)) were studied as donors for charge transfer complexation with iodine (1,) as a typical sigma-type CT acceptor and with 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ), and p-chloranil (CHL) as typical pi-type CT acceptors. Oxidation of the ferrocenes to the corresponding ferricinium salts is proposed to occur via initial formation of outer sphere charge transfer complexes. UV-Vis spectra for the mixtures of any of the ferrocene donors with 1, or DDQ in CH,C], showed the characteristic bands of the triiodide ion, V and the DDQ(.) anion radical. With CHL, the same behavior occurred only for Cp-2*Fe to give Cp-2*Fe+ and CHL. radicals. Elemental analyses of the isolated solid complexes indicated the formation of [ferrocene]I-3 for ferrocenes and I-2, except for (Fe2C2H4) which gave [(Fc(2)C(2)H(4))]I-5. Ferrocene-DDQ complexes were 1:1 except for (MeCP)2Fe and (Fc,C,H4) which gave 1:2 complexes. By using n-hexane as a non-polar solvent instead of CH2Cl2, the CT band of the Cp-2*Fe adduct has been observed and the formation constant for this CT complexation was found to be 3900 (+/-500) din 3 mol(-1). (C) 2004 Elsevier B.V. All rights reserved.
Reaction of [α-(trimethylsilyl)benzyl]ferrocenes with α-ferrocenylbenzyl cations
作者:Tadao Kondo、Keiji Yamamoto、Makoto Kumada
DOI:10.1016/s0022-328x(00)80651-8
日期:1973.11
Although methanolysis of [α-(trimethylsilyl)benzyl]ferrocene (I) and [p-methyl-α-(trimethylsilyl)benzyl]ferrocene (II) in the presence of anhydrous ferric chloride merely gave α-ferrocenylbenzyl methyl ether (III) and p-methyl-α-ferrocenylbenzyl methyl ether (IV), respectively, acid-catalyzed methanolysis of (I) and (II) in the presence of an equimolar amount of (III) or (IV) afforded 1,2-diferrocenyl-l
Ferrocene compounds XXII. Synthesis and reactions of some ferrocenylthiaaliphatic acids
作者:S. Lisac、V. Rapić
DOI:10.1016/0022-328x(95)05745-b
日期:1996.1
Condensation of several ferrocenylcarbinols (1) with thioglycolic acid, β-mercaptopropionic acid or β-mercaptoisobutyric acid in the presence of trifluoroacetic acid have given the corresponding ferrocenylthiaaliphatic acids (2–4) with 65–99% yields. Instead of the expected intramolecularly cyclized products, reactions of the acids 2–4 with trifluoroacetic anhydride give 23–30% ofthe 1,2-disubstituted
Reduction of ferrocenylmethyl quaternary ammonium iodides: Synthesis of methylferrocenes
作者:D.W. Slocum、R.L. Marchal、W.E. Jones
DOI:10.1016/s0022-328x(00)81496-5
日期:1974.6
A series of N-(2-substituted ferrocenylmethyl)-N,N,N-trimethylammonium iodides was reduced via sodium/ammonia and Emde reduction techniques to the corresponding 2-substituted methylferrocenes in order to examine the comparative utility of these two methods. Reduction of a series of N-(p-substituted benzyl)-N-ferrocenylmethyl-N,N-dimethylammonium halides demonstrated that both reductions apparently
Biferrocene and ferrocenylruthenocene react with HgCl2 to give very stable adducts. Large quadrupole splitting values (2.93 mm s−1 for biferrocene–2HgCl2 and 2.99 mm s−1 for ferrocenylruthenocene–5HgCl2, both at 78 K) indicate the presence of a direct interaction between the Fe and Hg atoms. The stabilities of their adducts suggest a chelating effect between the Fe and Fe or Fe and Ru atoms in biferrocene
双二茂铁和二茂铁基钌与 HgCl2 反应生成非常稳定的加合物。大的四极分裂值(双二茂铁-2HgCl2 为 2.93 mm s-1,二茂铁-5HgCl2 为 2.99 mm s-1,均在 78 K)表明 Fe 和 Hg 原子之间存在直接相互作用。它们的加合物的稳定性表明,Fe 和 Fe 或 Fe 和 Ru 原子分别在双二茂铁或二茂铁基二茂铁中具有螯合作用。
Intercalation of Alkyl-bridged Biferrocene Compounds into VOPO<sub>4</sub>and Gel-V<sub>2</sub>O<sub>5</sub>Interlayer Spaces
作者:Shoji Okuno、Gen-etsu Matsubayashi
DOI:10.1246/cl.1993.799
日期:1993.5
Alkyl-bridged biferrocene compounds, Fc(CH2)nFc [Fc = (C5H5)Fe(C5H4); n = 1 and 2] were intercalated into the VOPO4 and V2O5 interlayer spaces by the redox reaction between the ferrocenyl (Fc) group and the V(V) ion site. Further oxidation of the Fc center in the interlayer space depends on its proximity to another V(V) ion site.
烷基桥联二茂铁化合物,Fc(CH2)nFc [Fc = (C5H5)Fe(C5H4); n = 1和2]通过二茂铁基(Fc)基团和V(V)离子位点之间的氧化还原反应插入VOPO4和V2O5层间空间。层间空间中 Fc 中心的进一步氧化取决于其与另一个 V(V) 离子位点的接近程度。