Results

101 - 125 of 242
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
(2) C~H1802, Mr=182"3, monoclinic, P21/a, a = 7.463 (3), b = 9.776 (3), c = 14-955 (5) A, fl = 97.33 °, V = 1082-2 A 3, Z = 4, Dx = 1.12 gcm -3, a(Mo Ka) = 0.71073/~, ~ = 0.70 cm-i, F(000) = 400, room temperature, R = 0.041 for 480 observed reflections. (5) CI3H2202, Mr = 210-3, orthorhombic, Pnab,...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The synthesis and characterization of a new class of bis(cyclopentadieny1iron) arene complexes of disulfides and diamines with aliphatic and aromatic bridges are presented. Reactions of the aromatic or aliphatic dithiols with a wide range of cyclopentadienyliron complexes of chloroarenes (la-i), in ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Recently, we have focused on the synthesis of monomeric and polymeric cationic organoiron functionalized with azo dyes. In this presentation we will describe the synthesis of novel polyferrocene incorporating azo dyes and pendent cyclopentadienyliron cations. Condensation of 1,1'-ferrocenedicar...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The synthesis of the title complex was achieved via the reaction of a η6-p-dichlorobenzene-η5-cyclopentadienyliron cation with an organic four-arm core to produce the tetrairon complex. This tetrairon-containing core was subsequently polymerized via nucleophilic aromatic substitution with various ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The synthesis of the title complexes was achieved via the reaction of η6 -p-dichlorobenzene- η5 -cyclopentadienyliron cations with 4,4′-bis(4-hydroxyphenyl)valeric acid to produce the diiron complexes which were then reacted with a number of arylazo dyes to give cationic bis(cyclopentadienyliron...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The synthesis of sulfone-containing monomers with pendent cationic cyclopentadienyliron (CpFe+) moieties has been accomplished via nucleophilic aromatic substitution of dichloroarene complexes with a number aliphatic dithiols. These complexes were further oxidized using m-CPBA to give the sulfone-ba...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Electrochemical reduction of the cyclopentadienyliron hexafluorophosphates of benzophenone, o-chlorophenyldibenzoylmethane and diethyl ethylphenylmalonate led to the liberation of arenes without reduction of keto or ester groups in over 85% yields.
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The synthesis of cationic cyclopentadienyliron-containing polymers with pendent azobenzene chromophores was accomplished via metal-mediated nucleophilic aromatic substitution reactions. All of the desired polymers were isolated as vibrantly coloured materials and displayed excellent solubility in po...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Nucleophilic substitution reactions of the (η6-o-, -m-, or -p-chloronitrobenzene)(η5-cyclopentadienyl)iron cation (2a, 2b, or 2c, respectively) with aniline, n-butylamine, or pyrrolidine as nucleophile were investigated. It was found that only selective displacement of the nitro group occurred for...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Double nucleophilic substitution of 1,2-, 1,3-, or 1,4-(HO)2C6H4 with [(η5-C5H5)Fe(η6-C6H5Cl)]+ PF6- (anion assumed) and K2CO3 in THF/DMF afforded the corresponding bis(cyclopentadienyliron) arom. ether complexes I, isolated as PF6- salts. Compds. I and biphenyl analogs were prepd. in 70-95% y...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A new development in the chemistry of arenes activated toward SNAr reactions by the cyclopentadienyliron (FeCp+) moiety is presented in this work. A class of diiron complexes of diphenoxybenzenes was prepared in a highly efficient and very mild fashion. Dihydroxy aromatic compounds served as dinucle...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A review of classes of organoiron polymers contg. azo dyes pendent to, or in their backbone which were prepd. The 1st class includes cationic organometallic polyethers, polythioethers and polynorbornenes incorporating aryl and hetaryl azo dyes. These organometallic polymers were synthesized via nucl...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Polyethers and/or thioethers contg. organoiron moities in either the backbone or the side chain were prepd. under mild reaction conditions. Polysiloxanes contg. arene cyclopentadienyliron or ferrocene moieties were also prepd. and their morphol. thermal and spectroscopic characterizations were examd...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The introduction of metallic moieties coordinated to arenes resulted in polyethers or polyether/thioethers, which have excellent thermal properties. A no. of new cationic organoiron- and ferrocene-contg. linear and crosslinked polymers was achieved successfully via acid-catalyzed condensation polymn...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
This review is designed to highlight the recent advances in the field of organometallic and coordination macromolecules. It is organized by the particular properties that the macromolecules possess. The aim of this article is to provide a comprehensive review of the synthesis and properties of organ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A series of coumarins were reacted with methacrylate or styrene derivs. to form new olefinic coumarin monomers that were polymd. using 2,2'-azobisisobutyronitrile. These polymers were highly insol. in org. solvents and displayed good thermal stability with glass-transition temps. 70-130°. Lumines...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Ferrocene-based polymers contg. azo groups in their backbone were synthesized by condensation polymn. of a cationic organometallic monomer contg. two azo dye moieties and ferrocene in the backbone as well as pendent cationic iron groups with 1,3-diaminopropane, 4,4'-thiobisbenzenethiol or bisphenol ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Ferrocene-based monomers were prepd. via the reaction of cationic chloroarene cyclopentadienyliron complex cations with 1,1'-ferrocene dicarbonyl chloride. These monomers were then reacted with O-, S- and N- contg. dinucleophiles to give the polymeric materials with neutral iron moieties in the back...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
There has been tremendous interest in organoiron macromols. This interest stems from their application as chem. sensors, electrocatalysts, modified electrodes and photo-active mol. devices. Herein, we report the synthesis and characterization of a no. of different classes of organoiron macromols. co...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
There has been tremendous interest in organoiron macromols. This interest stems from their application as chem. sensors, electrocatalysts, modified electrodes and photo-active mol. devices. Herein, we report the synthesis and characterization of a no. of different classes of organoiron macromols. co...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The versatility of cationic cyclopentadienyliron complexes is demonstrated for the generation of calix[4]arene-based dendrimers and polymers. Dendrimers were prepared from a branched organoiron calix[4]arene through subsequent reactions of azo dyes and organoiron complexes. The resulting azo dye-con...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A modified synthesis of 25-allyl-26,27,28-trihydroxycalix[4]arene is reported. This calix[4]arene was utilized to prepare calix[4]arenes containing norbornene and calix[4]arene containing azo dyes and norbornene on their upper rims. The calixarene monomers were reacted with Grubbs' second generation...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A series of polynorbornene homo- and copolymers containing aryl- and/or hetaryl-azo dyes were prepared through ring-opening metathesis polymerization (ROMP). Thermal studies indicated that the polymers were thermally stable up to 250 °C, and possessed glass transition temperatures ranging from 93...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Prepn. of organoiron monomers that contain one or more azo dye functionalities was performed. It was found that the resulting organoiron complex contained multiple azo dyes functionalities. Very good yields of organoiron polymers contg. multiple dyes were obtained for the nucleophilic arom. substitu...