metallocene
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Metallocene — Metallocene, Klasse von Katalysatoren, die bei der Herstellung von Kunststoffen, v. a. von Polypropylen und Polyethylen, den konventionellen Ziegler Natta Katalysatoren in der katalytischen Wirkung um das Zehn bis Hundertfache überlegen sind.… … Universal-Lexikon
Metallocene — General chemical structure of a Metallocene compound, where M is a metal cation A metallocene is a compound typically consisting of two cyclopentadienyl anions (Cp, which is C5H5 ) bound to a metal center (M) in the oxidation state II, with the… … Wikipedia
Metallocene — Struktur von Metallocenen Metallocene sind Sandwichverbindungen mit zwei Cyclopentadienylresten. Sie sind also organometallische Komplexe der Form: M(Cp)2. Die 6 π Elektronen des aromatischen Cyclopentadienylsystems binden gleichmäßig an das… … Deutsch Wikipedia
Métallocène — Structure chimique générale d un composé métallocène, où M est un élément métallique. Les métallocènes sont des complexes de cations métalliques [comme ceux du fer (Fe2 + ) ou du zirconium (Zr4 + )] avec des ligands tels l anion … Wikipédia en Français
metallocene — metalocenas statusas T sritis chemija apibrėžtis Pereinamojo metalo kompleksas su karbociklinėmis grupėmis, turinčiomis delokalizuotas π orbitales. atitikmenys: angl. metallocene; sandwich compound rus. металлоцен … Chemijos terminų aiškinamasis žodynas
metallocene — noun any of a class of organic compound containing two cyclopentadienyl anions and a transition metal whose bonding involves overlap of ns and np orbitals of the metal with molecular orbitals of appropriate symmetry of each cyclopentadienyl ring; … Wiktionary
metallocene — /meuh tal euh seen /, n. Chem. an organometallic coordination compound consisting of a metal bonded to one or two rings of cyclopentadiene. Cf. ferrocene. [METALLO + cene < Gk koinós shared (see CENO 2)] … Useful english dictionary
Post-metallocene catalyst — A post metallocene catalyst is a kind of catalyst for olefin polymerization. Post metallocene refers to the generation of catalysts following Kaminsky catalysts, which are metallocene catalysts discovered in 1980 by Walter Kaminsky, and have been … Wikipedia
Ziegler–Natta catalyst — A Ziegler–Natta catalyst is a catalyst used in the synthesis of polymers of 1 alkenes (α olefins). Three types of Ziegler–Natta catalysts are currently employed: Solid and supported catalysts based on titanium compounds. They are used in… … Wikipedia
Polypropylene — Chembox new Name = Polypropylene ImageFile = Polypropylen.svg ImageSize = 100px ImageName = Polypropylene IUPACName = poly(propene) OtherNames = Polypropylene; Polypropene; Polipropene 25 [USAN] ;Propene polymers; Propylene polymers; 1 Propene… … Wikipedia
