Consentement d'utilisation des Cookies

J'accepte. Notre site sauvegarde des traceurs textes (cookies) sur votre appareil afin de vous garantir de meilleurs contenus et à des fins de collectes statistiques.Vous pouvez désactiver l'usage des cookies en changeant les paramètres de votre navigateur. En poursuivant votre navigation sur notre site sans changer vos paramètres de navigateur vous nous accordez la permission de conserver des informations sur votre appareil.

1271-19-8 - Bis(cyclopentadienyl)titanium dichloride, 97% - Dichlorobis(cyclopentadienyl)titanium - Titanocene dichloride - A11456 - Alfa Aesar

A11456 Bis(cyclopentadienyl)titanium dichloride, 97%

Numéro de CAS
1271-19-8
Synonymes
Dichlorobis(cyclopentadienyl)titanium
Titanocene dichloride

Conditionnement Prix ($) Quantité Disponibilité
10g 39,40
50g 117,00
250g 466,00
Ajouter au panier Ajouter au devis en vrac Afficher l'article

Bis(cyclopentadienyl)titanium dichloride, 97%

MDL
MFCD00003723
EINECS
215-035-9

Propriétés chimiques

Formule
C10H10Cl2Ti
Poids moleculaire
249.00
Point de fusion
ca 285° dec.
Densité
1.60
Sensibilité
Air & Moisture Sensitive
Solubilité
Slightly soluble in water

Applications

One-pot synthesis of α-methylene-γ-butyrolactones from benzaldehydes and bromomethylacrylates. Bis-(cyclopentadienyl)-titanium dichloride alkylaluminum complexls acts as catalysts for the polymerization of ethylene. Polyethylene prepared with these catalysts. Complexes of aluminum chloride and methylaluminum dichloride with bis-(cyclopentadienyl)-titanium dichloride as catalysts for the polymerization of ethylene.

Notes

Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Store away from strong oxidizing agents, moisture, water, air.

Références bibliographiques

Wendell P. Long,; David S. Breslow. Polymerization of Ethylene with Bis-(cyclopentadienyl)-titanium Dichloride and Diethylaluminum Chloride. J. Am. Chem. Soc. 1960, 82 (8), 1953-1957.

Wendell P. Long. Complexes of Aluminum Chloride and Methylaluminum Dichloride with Bis-(cyclopentadienyl)-titanium Dichloride as Catalysts for the Polymerization of Ethylene . J. Am. Chem. Soc. 1959, 81 (20),5312-5316.

In combination with trimethyaluminum, generates an ylide (Tebbe reagent): J. Am. Chem. Soc., 100, 3611 (1978), which transfers a methylene group not only to aldehydes and ketones (cf Wittig reaction) but also to the carbonyl groups of esters and lactones: J. Am. Chem. Soc., 102, 3270 (1980):

A similar reagent can be prepared by reaction with the Simmons-Smith adduct (see Diiodomethane, A15457) and used for the methylenation of ketones in excellent yields: Tetrahedron Lett., 24, 2043 (1983).

Reacts with Grignard reagents with a ß-hydrogen atom (e.g. isobutyl or isopropyl) to form, in a catalytic cycle, a titanium hydride species, which reduces aldehydes, ketones and esters to alcohols: Tetrahedron Lett., 21, 2171, 2175 (1980). The same combination effects regioselective cis-hydromagnesation of alkynes to give alkenyl Grignard reagents: Tetrahedron Lett., 22, 85 (1981); J. Chem. Soc., Chem. Commun., 718 (1981). For application in a highly stereospecific synthesis of vinylsilanes in excellent yields, see: Tetrahedron Lett., 24, 1041 (1983):

For further examples of the hydroxymagnesation of alkynes, see: Org. Synth. Coll., 8, 507 (1993). Similarly π-allyl complexes with 1,3-dienes can be generated, which react regio-and stereo-selectively with aldehydes to give homoallylic alcohols: J. Chem. Soc., Chem. Commun., 621 (1984):

For use, in combination with Mg metal, in formation of titanocycle intermediates, see: J. Org. Chem., 63, 9285 (1998); for reaction scheme, see Triphosgene, A14932.

Mentions de danger et de prudence du SGH

Mentions de danger (UE): H302-H332-H315-H319-H341-H335

Harmful if swallowed. Harmful if inhaled. Causes skin irritation. Causes serious eye irritation. Suspected of causing genetic defects. May cause respiratory irritation.

Mentions de prudence: P201-P261-P280-P305+P351+P338-P405-P501a

Obtain special instructions before use. Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Autres références

Merck
14,9482
Code tarifaire harmonisé
2931.90
TSCA
Yes
RTECS
XR2050000

Recommandé

Consulté récemment

Produits chimiques

Sciences de la vie

Métaux et matériaux

Catalyseurs

Analytique et matériel de laboratoire