Ferrocene metal salt

It is well known that transition-metal salts and metal complexes, unlike non-Werner-type ferrocene compounds, act as inhibitors in the polymerization of vinyl monomers. For example, the radical polymerization of vinylpyridine is strongly inhibited in the presence of Cu(II) or Fe(III)32 However, vinylpyridine with Cu(I)... 

Although a selection of ferrocene crown ethers (Scheme 4) were initially reported by Biernat and Wilczewski (44), Saji (45) described the first evidence of anodic shifts in the oxidation potential of pentaoxa[13]-ferrocenophane (6) resulting from the addition of alkali metal salts. Two distinct electrochemical CV waves corresponding to complexed and uncomplexed (6) were observed for both Na+ and Li+ guest cations (Fig. 4). The respective anodic shifts correspond to a decrease of the... 

Moreover, vinyl-bridged Pc adducts with ferrocene derivatives have been described [78,79], Upon reaction of 3,4-dicyanobenzylphosphonate with formylfer-rocene under Wittig-Horner conditions with the corresponding ferrocene-containing mono- or bisphthalonitriles have been obtained, which were then subjected to statistical cyclotetramerization with 4-tert-butylphthalonitrile in the presence of the appropriate metal salt. Furthermore, a double bond has also been employed as spacer between the Pc and ruthenium(trisbipyridine) [47],... 

Ferrocene and other cyclopentadienyl complexes can be prepared by reacting metal salts with... 

It is well known that sulfide ligands form stable complexes with soft metal cations [30] and numerous complexes of macrocyclic thioethers with various metal salts have been prepared and characterized [31]. The iron atom of ferrocene is also basic and therefore affords a potential coordination site as evidenced by derivatives of ferrocene that are known to form complexes with certain metal salts [32]. Thus,... 

Bis(cyclopentadienyl)iron derivatives, ferrocenes, are remarkably stable against heat and air and undergo various kinds of chemical reactions. They are usually prepared by the reaction of FeCh with an alkali metal salt of cyclopentadienyl or cyclopentadiene in the presence of base [51]. Although ferrocene derivatives basically have chemical reactivities similar to those of aromatic compounds, they have found only limited applications to organic synthesis so far. However, because chiral ferrocenylphosphines are capable of having both planar chirality and an asymmetry in the side chain in their rigid framework, they have been used recently in a number of asymmetric reactions. In this section, synthesis and developments of monocyclopentadienyl complexes and ferrocenylphosphines are described. The general chemistry of ferrocenes and half metallocene complexes is reviewed elsewhere [52-53]. 

CI3OP Noncombustible liquid. Fumes in moist air. Contact with water, steam, or alcohols produces hydrochloric acid, phosphoric acid, and phosphine gas, which is pyrophoric, with possible ignition or explosion (may be a delayed reaction). Contact with air produces corrosive fumes. Violent reaction with acetone and possibly other ketones carbon disulfide, 2,6-dimethylpyridine-A-oxide, dimethyl sulfoxide, ethers (especially when metal salts are present) ferrocene-l,l -dicarboxylie acid, pyridine, zinc powder or dust. Reacts, possibly violently, with acids, bases, amines, amides, inorganic hydroxides alkali metals, alkalis, combustible materials, dimethyl... 

Hausler and Taylor [7] used 100 A /i-Styragel with toluene as eluent (0.5-1.0mLmin ) to separate metal salts of dialkylbenzene sulphonates in a petroleum-based matrix. A specially-designed nebulizer was used for ICP-AES detection. A mixture of four ferrocenes was clearly separated into four peaks, in the elution order bis(tetrapyrazolylborate) iron, 1, I -diacetylferrocene, acetylferrocene and ferrocene. Metal detection limits were similar to those obtained with aqueous samples. 

The exchange reaction is catalyzed by various metal salts and complexes, such as Cul or CuCN [87], PdCl2(dppf) (dppf, l,l -bis(diphenylphosphino)ferrocene) [88], and Ni(acac)2 (acac, acetylacetonate) [89], allowing for shorter reaction times and the use of reduced amounts of diethylzinc. In the last two cases, the exchange reaction can also be conducted on alkyl bromides and even chlorides. Interestingly,... 

Other types of bonding include donation by Ligand TT-orbitals, as in the classical Zeiss s salt ion [Pt( 7 -CH2=CH2)Cl3] [12275-00-2] and sandwich compounds such as ferrocene. Another type is the delta (5) bond, as in the Re2Clg ion, which consists of two ReCl squares with the Re—Re bonding and echpsed chlorides. The Re—Re 5 bond makes the system quadmply bonded and holds the chlorides in sterically crowded conditions. Numerous other coordination compounds contain two or more metal atoms having metal—metal bonds (11). 

The dithiophosphonic acid monoesters, RP(OR )(S)SH can be conveniently prepared by cleavage of dimeric, cyclic diphosphetane disulfides, [RP(S)S]2 with alcohols, silanols, or trialkylsilylalcohols180 and then can be converted into metal complexes M[SPR(OR )]2 without isolation.181 The substituted ferrocenyl anion, (N3C6H4CH20)(CpFeC5H4)PS2 has been prepared in two steps from P4Sio, ferrocene and hydroxymethylbenzotriazole (and its salt was used for the preparation of some nickel and rhodium complexes).182 Zwitter-ionic ferrocenylditiophosphonates,... 

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