| Identification | Back Directory | [Name]
Bis(cyclopentadienyl)dimethyltitanium | [CAS]
1271-66-5 | [Synonyms]
petatis
PETATIS REAGENT
DIMETHYLTITANOCENE
Dimethyltitanocene
(5% in Tetrahydrofuran/Toluene)
Dimethyltitanocene (5% in Toluene)
BIS(CYCLOPENTADIENYL)DIMETHYLTITANIUM
BIS-(CYCLOPENTADIENYL)-DIMETHYLTITANIUM(IV)
DiMethyltitanocene (5% in Tetrahydrofuran/Toluene)
Bis(cyclopentadienyl)dimethyltitanium
Petasis Reagent
Bis(cyclopentadienyl)dimethyltitanium, 5 wt% in toluene
Bis(cyclopentadienyl)dimethyltitanium5 wt% in tolueneAcroSeal§3
Bis(cyclopentadienyl)dimethyltitanium, 5 WT% solution in toluene
Bis(cyclopentadienyl)dimethyltitanium, 5 wt% in toluene, AcroSeal | [Molecular Formula]
C12H16Ti | [MDL Number]
MFCD02093882 | [MOL File]
1271-66-5.mol | [Molecular Weight]
208.12 |
| Chemical Properties | Back Directory | [Appearance]
Orange to dark red solution | [Melting point ]
>90 °C dec | [refractive index ]
1.49 | [storage temp. ]
Freezer (-20°C) | [solubility ]
sol most aprotic organic solvents, e.g. Et2O, THF, CH2Cl2, toluene, hexanes | [form ]
clear liquid | [color ]
Orange to Red | [Water Solubility ]
SLOW hydrolysis |
| Hazard Information | Back Directory | [Chemical Properties]
Orange to dark red solution | [Uses]
Used as reagent of low basicity and acidity, useful for the methylenation of carbonyl compounds;
methylenates highly enolizable ketones, esters and lactones, including aldonolactones and acid-labile substrates;
homologs of the reagent perform carbonyl alkylidenations;
reacts with alkynes and nitriles and can initiate the ring-opening metathesis polymerization of strained cyclic alkenes;
Bis(cyclopentadienyl)dimethyltitanium is a useful precursor for Ziegler-Natta polymerization catalysts, a cocatalyst for alkene metathesis and a catalyst for alkene hydrogenation and the dehydrogenative coupling of silanes.
| [Preparation]
Bis(cyclopentadienyl)dimethyltitanium is prepared by a solution of Methyllithium (2.1 equiv) in Et2O is added dropwise to a suspension of Dichlorobis(cyclopentadienyl)titanium in Et2O (3-5 mL mmol-1) cooled in an ice bath. After 1 h the reaction mixture is quenched with ice water, the ether layer is separated, dried over MgSO4, filtered and evaporated. The resulting bright orange crystals of the reagent, obtained in 95% yield, are dissolved in THF or toluene and stored in the dark, in the refrigerator or freezer. | [storage]
Sensitive to oxygen and light, but can be briefly exposed to air and water. In the solid state the reagent is not stable for more than a few hours at rt, but it can be stored for months in the dark as a THF or toluene solution. Although it is stable in solution at rt, the reagent is best stored in a refrigerator. |
|
| Company Name: |
Energy Chemical
|
| Tel: |
021-021-58432009 400-005-6266 |
| Website: |
http://www.energy-chemical.com |
|