Showing papers on "Ferrocene published in 1975"
68 citations
TL;DR: In this paper, the influence of substituent groups on the 13 C shifts of the carbons of the ferrocene rings has been investigated, in relation to the distribution of positive charge and various structural models which have been proposed for such species.
52 citations
50 citations
47 citations
TL;DR: In this article, Anthracene reacts with ferrocene in the presence of AlCl 3 /Al to form the same mono-and dications derived from 9,10-dihydroanthracene.
46 citations
35 citations
TL;DR: In this article, the anisotropic structural evolution of ferrocene has been studied using X-ray powder diagrams in the range 15 to 295'k, by means of a prototype diffractometer and a high-efficiency cryostat.
Abstract: About fifty X-ray powder diagrams were recorded in the range 15 to 295 K, by means of a prototype diffractometer and a high-efficiency cryostat, so that a very precise study of the anisotropic structural evolution of ferrocene could be made. The cell parameters and volume have been computed. These parameters present a discontinuity at 164 K; the cell is triclinic below and monoclinic above this temperature. The transition is first order. The principal thermal expansion coefficients have been computed and their evolution, in terms of temperature, has been related to the anisotropic change of the intermolecular contacts in the crystal. Assumptions about the mechanism of transition and about the ferrocene configuration in the ordered phase are expressed.
33 citations
TL;DR: In this article, the triplet state of methylene blue was quenched by ferrocene and p-phenylenediamine at a diffusion-controlled rate, yielding the semi-reduced dye.
Abstract: Quenching of the triplet state of methylene blue by ferrocene and p-phenylenediamine in ethanol has been investigated by an emission-absorption flash technique. The triplet dye is quenched by ferrocene and p-phenylenediamine at a diffusion-controlled rate, yielding the semi-reduced dye. Efficiency of the semi-reduced dye formation is 0.09 and 1.0 for ferrocene and p-phenylenediamine, respectively. Since the triplet level of the dye is lower than that of ferrocene, quenching of the triplet dye by ferrocene seems to occur through the charge (electron) transfer interaction.
33 citations
TL;DR: In this article, the results of the photolysis of ferrocene, ruthenocene, nickelocene, cobaltocene, bisbenzenechromium and their respective cations were discussed in terms of the electronic structures of the compounds.
29 citations
TL;DR: In this paper, a cyclic voltammogram of (FcCNP)Cr(CO) 4 was presented, showing that at + 0.54 V the solution color changed from yellow to orange and the v (CO) bands shifted from 2011 w, 1891 s, and 1831 s (cm −1 ) in the neutral complex to 2080 m, 2000 s and 1970 s in the singly oxidized species.
20 citations
TL;DR: The crystal and molecular structure of 1,1-(1″,3″ -cyclopentylene)ferrocene, prepared by cleavage of ferrocene by AlCl3, has been determined by a single crystal X-ray study as discussed by the authors.
TL;DR: A series of 1,1′-oligomeric ferrocenes, including biferrocene, 1, 1′-biferrocenylene, 1 1 ′-terferrocene and 1 1 ¼ ¼ quaterferrocenes were formed by the reaction between chloromercuriferrocenes and 1 − 1 −bis(chloromercuri)ferrocens in the presence of palladium(II) salt as discussed by the authors.
Abstract: A series of 1,1′-oligomeric ferrocenes, including biferrocene, 1,1′-biferrocenylene, 1,1 ′-terferrocene, 1,1′-quaterferrocene, 1,1′-quinqueferrocene, and 1,1′-sexiferrocene, was formed by the reaction between chloromercuriferrocene and 1,1′-bis(chloromercuri)ferrocene in the presence of palladium(II) salt.
TL;DR: In this article, a method for the preparation of 1,2-diacetylferrocene, in which ferrocene is acetylated with acetyl chloride in the presence of AlCl3 in methylene chloride, was described.
TL;DR: In this paper, an intermolecular exchange between two molecules of aryl- or aralkyl-ferrocene with AlCl3 as catalyst is described, where the cyclopentadienyl ring of one molecule is replaced by the phenyl nucleus of another similar molecule.
TL;DR: Both conjugated and nonconjugated ferrocene polymers were partially oxidized by DDQ, TCNQ, and I2 to give mixed valence semiconducting polymers.
Abstract: Both conjugated and nonconjugated ferrocene polymers were partially oxidized by DDQ, TCNQ, and I2 to give mixed valence semiconducting polymers.
TL;DR: In this paper, a method for synthesizing cyanenamine derivatives of [ m ]ferrocenophanes (m = 3,5,11,15) by cyclization of 1,1′-bis(ω-cyanoalkyl)ferrocenes (Fcd[(CH 2 ) n CN] 2, n = 1,2,5 or 7; Fcd = C 5H 4 FeC 5 H 4 ) using CH 3 MgI and C 6 H 5 N(CH 3 )Na).
TL;DR: The mass spectral properties of the title compounds have been recorded and compared in this paper, where a major ion present in all haloacetyl spectra is derived from the corresponding acetyl compound, CH3CO-, formed via an instrument catalyzed reduction of the halo compounds by residual water.
Abstract: The mass spectral properties of the title compounds have been recorded and compared. For the haloacetyl systems ring expansions to tropylium ions and π-benzene iron ions are observed. A major ion present in all haloacetyl spectra is that derived from the corresponding acetyl compound, CH3CO-, formed via an instrument catalyzed reduction of the halo compounds by residual water. Some substituent effects are observed. Considerable halogen migration to iron is observed for the ferrocene complexes.
TL;DR: Ferrocene and derivatives can be hydrogenated in acidic medium at ambien temperature and atmospheric hydrogen pressure using supported palladium as the catalyst as discussed by the authors, which is the same as the one used in this paper.
TL;DR: In this article, the treatment of (1-hydroxy-1-phenylethyl)ferrocene (III) in hexane with O2 in the presence of SiO2 or acidic Al2O3 gave several oxidative dimerization products: butadiene (VIII), 1,4-dihydroxybutane (IX), and tetrahydrofuran derivatives (Xa and b).
Abstract: Treatment of (1-hydroxy-1-phenylethyl)ferrocene (III) in hexane with O2 in the presence of SiO2 or acidic Al2O3 gave several oxidative dimerization products: butadiene (VIII), 1,4-dihydroxybutane (IX), and tetrahydrofuran derivatives (Xa and b). Production of these compounds suggests formation of an unisolated peroxide (XII) as an intermediate.
TL;DR: In this paper, the retentions following (n, γ) reactions in solid state and in solutions in hexane, benzene and dimethylsulfoxide were measured for ferrocene and for four trimethylene bridged derivatives of the compound.
TL;DR: Dimethylaminomethyl ferrocene has been reacted with CoBr 2, CoI 2, Co(ClO 4 ) 2.6H 2 O, CoNo 3, CoSO 4.7 H 2 O in ethanol and in methylene chloride as discussed by the authors.
TL;DR: The acidity level and the fluoride ion activity were evaluated in anhydrous HF and in water+HF mixtures of HF content higher than 70% by means of R (H) and R (F) functions as mentioned in this paper.
TL;DR: In this paper, a method was developed for the synthesis of heteroannularly substituted ferrocenyl derivatives of gold, XC5H4FeC5h4AuPPh3, from organomercury compounds via the cationic gold complexes.
Abstract: A method was developed for the synthesis of heteroannularly substituted ferrocenyl derivatives of gold, XC5H4FeC5H4AuPPh3, from organomercury compounds via the cationic gold complexes [XC5H4FeC5H4-(AuPPh3)2]+BF4−, X=Br, Cl, OCH3, COOCH3.
Patent•
28 Feb 1975TL;DR: In this paper, the authors proposed a photodegradable composite based on vinyl chloride polymers containing a ferrocene and an α-phenylindole as sensitizers to accelerate natural photodegradation.
Abstract: Photodegradable compositions based on vinyl chloride polymers containing a ferrocene and an α-phenylindole as sensitizers to accelerate natural photodegradation and their use in the production of hollow bodies. Said compositions undergo photodegradation appreciably more quickly than known compositions based on vinyl chloride polymers containing solely a ferrocene.
TL;DR: Cymantrene was found to incorporate into a ferrocene clathrate of thiourea in this paper, and a novel proof of clathration was demonstrated utilizing photochemical decarbonylation.
Abstract: Cymantrene is found to incorporate into a ferrocene clathrate of thiourea. Inclusion of cymantrene in the absence of ferrocene does not occur. A novel proof of clathration is demonstrated utilizing photochemical decarbonylation.
01 Jan 1975
TL;DR: In this article, the triplet state of methylene blue was quenched by ferrocene and p-phenylenediamine at a diffusion-controlled rate, yielding the semi-reduced dye.
Abstract: Quenching of the triplet state of methylene blue by ferrocene and p-phenylenediamine in ethanol has been investigated by an emission-absorption flash technique. The triplet dye is quenched by ferrocene and p-phenylenediamine at a diffusion-controlled rate, yielding the semi-reduced dye. Efficiency of the semi-reduced dye formation is 0.09 and 1.0 for ferrocene and p-phenylenediamine, respectively. Since the triplet level of the dye is lower than that of ferrocene, quenching of the triplet dye by ferrocene seems to occur through the charge (electron) transfer interaction.
TL;DR: In this article, the 1-(1-hydroxy-1-phenylethyl)-1′-(1′-hydroxyphenylpropyl)-ferrocene with molecular oxygen and acid was cycled stereoselectively.