Ferrocene complexes

The discovery in 1951 of the transition metal rr-complex, ferrocene or bis-cyclopentadienyl-iron, Fe(Cp)2, (1, 2) led to enormous interest being shown in the possible structures of such compounds and in the nature of the metal-ring bonding. Within a year the sandwich type structure (Fig. 1) had been proposed (2), and an outline treatment of the metal 3d-ligand 7r-orbital interaction by Jaffe (4) was soon followed by a more detailed molecular... 

Over the past decade a number of new covalently bonded TTF/ferrocene adducts have been reported [77, 78]. The crystal structure of the l,l -bis(l,3-dithiole-2-ylidine)-substituted ferrocene derivative has been published [77]. In this complex, ferrocene has essentially been incorporated as a molecular spacer between the two l,3-dithole-2-ylidene rings forming a stretched TTF molecule. This adduct, and its methyl-substituted derivative, have been combined with TCNQ to form charge-transfer complexes with room temperature powder conductivities of 0.2 S cm-1. Similar diferrocenyl complexes have been prepared with bis (dithiolene) metal complexes [79, 80]. 

Compounds differing in charge, shape, or molecular weight may have markedly different diffusion coefficients. For example, D values in CH3CN for the metal sandwich complexes ferrocene and (C6Me6)2Ru2+ are reported as 2 x 10 5 cm2/s and 0.7 x 10 5 cm2/s, respectively [7],... 

M. C. Zerner, G. H. Loew, R. F. Kirchner, and U. T. Mueller-Westerhoff, /. Am. Cbem. Soc., 102, 589 (1980). An Intermediate Neglect of Differential Overlap Technique for Spectroscopy of Transition-Metal Complexes. Ferrocene... 

In 2006, for the first time, the decoration of viral particles with redox-active moieties was reported [83,96]. The decoration of CPMV with a redox-active organo-metallic complex, ferrocene, and also with an organic redox-active compound, viologen, was achieved. Both approaches led to the generation of monodisperse redox-active nanoparticles the redox centers were presented in multiple copies on the solvent-exposed outer surface. 

From a different point of view, oxidation in presence of the )9-CD host takes place only on the free ferrocene guest, and no direct oxidation of the complexed guest takes place, suggesting that the electron transfer from the complexed ferrocene guest is in some way disfavored because of some thermodynamic or kinetic effect exerted by the host framework. 

Complex Ferrocene-centred oxidations Molyb- denum- centred oxidation p.v Solvent Ref. 

Complex Ferrocene- centered oxidation V Iron (II) clathrochelate centre ... 

Complex Ferrocene-centered oxidation E° V Ruthenocene-centered oxidation Solvent Reference... 

There is a large class of iron organometallic compounds which can be described as molecular, diamagnetic, and highly covalent. They are derived in the main from the parent compounds iron pentacarbonyl, Fe(CO)s, and the cyclopentadienyl complex ferrocene, (jr-CsHslaFe or CpaFe. In view of their large numbers, it is not surprising that considerable Mossbauer spectral data are available, but as we shall now see the interpretation of this data introduces considerable problems. 

Figure 29 The metallamacrocycles produced by reaction of [Fe( ) -C5H4-1 -C5H4N)2] and the salts ZnCb (a) and Cd(N03)2 (b). The starting material has been obtained by a Suzuki coupling reaction in the solid state starting from the complex ferrocene-1,1 -diboronic acid [Fe( -C5H4-B(OH)2)2l Reprinted in part with permission from Braga, D. D Addario, D. Grepioni, F. Polito, M. Proserpio, D.M. Steed, J. W. Tagliavini, E. Organometallics 2003, 22, 4532. 2003 American Chemical Society.

Epoxy resins can also be cured by polycondensation with amino resins or phenolic resins. Epoxy resins can be polymerized with catalysts such as tertiary amines, boron trifluoride complexes, ferrocenes, and triarylsulfonium salts. 

The reactions of lithioferrocenes with the ruthenium cmnplexes CpRu(CO)2Cl, Cp Ru(CO)2Cl and (C6Me6)Ru(CO)Cl2 have been used to prepare the tqiproixiate metathesis products. The redox behaviour of cis-[Pt (3-ferrocenylpyridine)2Cl2] has been examined and compared with similar results previously reported for 4-ferrocenylpyiidine complexes. Ferrocene reacts with methylundecanoate to give 70% of the ferrocenyl ester in the presence of AICI3. ... 

Cyclodextrin Inclusion Compounds of Organometallic Complexes. Ferrocene Inclusion Compounds... 

PREPARATION AND PROPERTIES OF CYCLODEXTRIN INCLUSION COMPOUNDS OF ORGANOMETALLIC COMPLEXES. FERROCENE INCLUSION COMPOUNDS... 

Cyclopentadiene [542-92-7] (CPD), CsHe, (1), and its more stable dimer, dicy-clopentadiene [77-73-6] (DCPD), C10H12, (2), are the major constituents of hydrocarbon resins, cyclic olefin polymers, and a host of specialty chemicals. They can be transformed into many chemical intermediates used in the production of pharmaceuticals, pesticides, perfumes, flame retardants, and antioxidants. Because of their wide industrial uses, their chemistry has been extensively investigated and documented. Numerous reviews (1-12) have been published on the subject. The production processes and industrial uses of CPD and DCPD are summarized in Reference 13. In addition to the classical organic reactions, CPD forms organic metallic complexes, ferrocene, with transition metals (14). Some of these complexes have been established as excellent olefin polymerization catalysts. Several reviews have been published on this rapid growing field (15-19) (see Single-Site Catalysts). 

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