The electrochem. study of a no. of polyarene-Fe complexes (e.g., I, 1,4-X,Y; X = Y = O, S) contg. etheric, sulfide, and sulfone bridges indicated that there were various degrees of interaction based on the nature of the bridging heteroatoms. While the electrochem. study of all etheric complexes show...

Arom. nucleophilic substitution reactions (SNAr) of chloroarene cyclopentadienyliron complex cations with K salts of dihydroxyalkanes in a THF/DMF mixt. gave bis(cyclopentadienyliron) arene dications with aliph. ether linkages. Diols were used to produce the diiron complexes I (R = H, x = 2, 4, 6, 8...

Some diaminochromenes, e.g., I, 7-amino-4-aryl-coumarins, 7-hydroxy-4-aryl-1,2-dihydroquinolines, and 2-amino-7-hydroxy-4-(4-chlorophenyl)-4H-chromenes were synthesized via Michael addn. of different substituted aminonaphthol, aminophenol, resorcinol derivs., chloronaphthol, and 4-hydroxycoumarin wi...

Complexes I (R1 = H, Me; R2 = Me, Cl) were used in the prepn. of phenylmalonate esters II. The arylation of CH2(CO2Et)2 by I and K2CO3 gave [(cyclopentadienyliron)phenyl]malonates III, and III underwent pyrolytic sublimation to give II. [on SciFinder(R)]

Several derivs. of coumarin-3N-carboxamides have been prepd. via the reaction of the coumarin-3-carbonyl chloride with a no. of nucleophiles. Novel double-headed coumarin-3N-carboxamides were also produced using the same method. The Pechmann-Duisberg reaction was applied to prep. new benzo[f]- benzo...

A review. Prepn. techniques and characterization of the transition metal-contg. polymers (organometallic polymers) where the metal is bonded to at least one org. group through σ- and/or π-bonds. [on SciFinder(R)]

Displacement of the terminal chloro groups of diiron arene complexes with 1-naphthol led to the formation of the corresponding complex with terminal naphthoxy groups. Photolytic demetallation of these complexes produced the monomeric blocks in good yields. Scholl polymn. was implemented leading to t...

A series of functionalized polynorbornenes contg. pendent ether- or ester-bridged poly(arom. ether) chains were prepd. The ether-bridged norbornene complex was synthesized via cyclopentadienyl iron-mediated nucleophilic arom. substitution reactions. This methodol., combined with that of dicyclohexyl...

Nucleophilic arom. substitution (SnAr) of cyclopentadienyliron-arene complexes with various aliph. or arom. dithiols followed by oxidn. and/or photolysis is presented as a viable route to the prepn. of the corresponding bis(sulfides) and bis(sulfones) in yields of 70-96%. The photochem. reaction of ...

Over the past few decades, we have seen a growing interest in the development of various classes of metal-contg. polymers. While polymers are traditionally carbon-based materials that contain only a few other elements, organometallic polymers could incorporate almost all the other elements of the pe...

Synthetic strategies for the design of oligomeric ethers with pendant cyclopentadienyliron moieties were developed. A wide range of these materials were prepd. via nucleophilic arom. substitution reactions of mono- or di-hydroxyarom. nucleophiles and a variety of chloroarene complexes under mild exp...

A unique synthetic route to cyclopentadienyliron complexes of functionalized nitrobenzene,e.g., I (e.g., R = Et),was developed via the successive oxidn. of the amine and the alkyl groups of their corresponding aniline complexes utilizing hydrogen peroxide. Nucleophilic arom. substitution reactions o...

Cyclic aryl ethers, thioethers or amines, and methods for synthesis are disclosed. These cyclic aryl compds. are synthesized by combining a first dinucleophile with a substituted benzene metalized electron-withdrawing complex, having halo or nitro substituent groups, to form a linear bimetalized ary...

Cyclic aryl ethers, thioethers or amines, and methods for synthesis are disclosed. These cyclic aryl compds. are synthesized by combining a first dinucleophile with a substituted benzene metalized electron-withdrawing complex, having halo or nitro substituent groups, to form a linear bimetalized ary...

As functionalization of the polynorbornene backbone has shown to be a viable route towards altering the thermal and chem. properties of the resulting polymeric material, our focus has been on the prepn. of norbornene monomers contg. a side-chain consisting of a rigid mesogen and/or an aliph. spacer....

Photolytic demetallation of cyclopentadienyliron complexes was investigated. Effects of solvent nucleophilicity, counter anion, wavelength, and nature of the arene were studied. Initial results indicate a dependence on the wavelength of the light source as well as the duration of photolysis, with de...

Ring-opening metathesis polymn. of organoiron norbornene monomers functionalized with azobenzene chromophores using the Grubbs catalyst was carried out to prep. the corresponding cationic organoiron polynorbornenes. The chiral monomers were prepd. by coupling reactions of complexes and 5-norbornene-...

Nucleophilic arom. substitution of isomeric chlorotoluenes complexed to the cyclopentadienyliron moiety with Et cyanoacetate in the presence of K2CO3 in DMF results in the formation of the isomeric Et tolylcyanoacetate complexes. Photolysis of these complexes leads to the formation of the title comp...

A detailed 1H NMR study of the title compds. I (R = Me, R1 = H; R = H, R1 = Cl) using difference NOE spectra and 2-D (COSY) techniques has shown that there is an enhanced restricted rotation about the arene-methine carbon bond with the formation of the complexes. [on SciFinder(R)]

The topic of metal-contg. polymers is reviewed with special emphasis on the need for polymeric materials for the 21st century and the role that metal and metalloid-contg. polymers will fill. Also emphasized is the wide variety of potential polymers including varying the metal, oxidn. state of the me...

Reactions of 5-norbornene-2-methanol with arene cyclopentadienyliron complexes led to the synthesis of two new classes of norbornene monomers with ether or ester bridges; ring-opening metathesis polymn. of these monomers using ruthenium-based catalysts gave rise to high mol. wt. polymers displaying ...

The title compd. (I) is monoclinic, space group P21/a, with a 7.463(3), b 9.776(3), c 14.955(5) Å, and β 97.33°; Z = 4 for dc = 1.12; final R = 0.041 for 480 reflections. Title compd. (II) is orthorhombic, space group Pnab, with a 9.747(1), b = 10.724(2), and c 24.365(4) Å; Z = 8 for d...

A review. The synthesis of sulfone-contg. monomers with pendent cationic cyclopentadienyliron (CpFe+) moieties has been accomplished via nucleophilic arom. substitution of dichloroarene complexes with a no. aliph. dithiols. These complexes were further oxidized using m-CPBA to give the sulfone-based...

Electrochem. redn. of the cyclopentadienyliron hexafluorophosphates of benzophenone, o-chlorophenyldibenzoylmethane and di-Et ethylphenylmalonate led to the liberation of arenes without redn. of keto or ester groups in over 85% yields. [on SciFinder(R)]

Nucleophilic substitution reactions of the (η6-o-, -m-, or -p-chloronitrobenzene)(η6-cyclopentadienyl)iron cation of I (R = 2-, 3-, 4-O2N) with PhNH2, BuNH2, or pyrrolidine as nucleophile were investigated. Only selective displacement of the nitro group occurred for reactions with PhNH2. For r...