144284-76-4

Basic information

• Product Name: 2,4,7-TRIMETHYL-1H-INDENE
• Synonyms: 2,4,7-TRIMETHYL-1H-INDENE;2,4,7-Trimethylindene
• CAS NO: 144284-76-4
• Molecular Formula: C₁₂H₁₄
• Molecular Weight: 158.243
• Product Categories: Indanone & Indene
• Mol File: 144284-76-4.mol
• Article Data: 7

Chemical Properties

• Boiling Point: 245℃
• Flash Point: 97℃
• Appearance: /
• Density: 0.974
• Storage Temp.: under inert gas (nitrogen or Argon) at 2-8°C
• CAS DataBase Reference: 2,4,7-TRIMETHYL-1H-INDENE(CAS DataBase Reference)
• NIST Chemistry Reference: 2,4,7-TRIMETHYL-1H-INDENE(144284-76-4)
• EPA Substance Registry System: 2,4,7-TRIMETHYL-1H-INDENE(144284-76-4)

Safety Data

• Hazardous Substances Data: 144284-76-4(Hazardous Substances Data)

Usage

General Description

2,4,7-TRIMETHYL-1H-INDENE is a chemical compound with the molecular formula C13H16. It is a colorless to pale yellow liquid with a strong aromatic odor. 2,4,7-TRIMETHYL-1H-INDENE is used in the production of fragrances and as a chemical intermediate for the synthesis of other organic compounds. It is also used in the manufacturing of dyes, resins, and pharmaceuticals. 2,4,7-TRIMETHYL-1H-INDENE is considered to be a flammable liquid and should be handled with care in a well-ventilated area. It is important to follow proper safety precautions when working with this chemical.

Upstream product

• 104-15-4 toluene-4-sulfonic acid 
• 105900-79-6 α-bromo(2,5-dimethylphenyl)-2-methylpropan-1-one 
• 106-42-3 para-xylene 
• 5445-46-5 1-(2,5-dimethylphenyl)-2-methyl-propane-1-one 
• 1057091-00-5 C₁₈H₃₀OSi 
• 96-39-9 methylcyclopentadiene 
• 110-13-4 2,5-hexanedione 
• 89044-50-8 2,4,7-trimethyl-2,3-dihydro-1H-inden-1-one 
• 166601-23-6 2,4,7-trimethyl-1-indanol 

Relevant articles and documents

A bridge linking and its application of metal complexes

The invention discloses a bridged metallocene complex, which is characterized by having a structural formula shown as the following A1, A2, A3 or A4. The invention also discloses a preparation method of ethylene propylene rubber. The ethylene propylene ru

Siloxy substituted metallocene catalysts

The invention provides a compound of formula (I) or (II) wherein R 1 and R 2 are bound to adjacent carbon atoms and are taken together to form a group -X-SiR' 2 -Y-SiR' 2 -X- or -X-SiR' 2 -X-; each R', which may be the same or different, is a C 1-20 -hydrocarbyl group; each X, which may be the same or different, is O, S, NH; Y is a group X or a bond; each R 3 , which may be the same or different, is a ring substituent or two R 3 groups taken together can form a further optionally R 3 substituted ring (e.g. to form an optionally substituted fluorenyl structure); m is 0 to 5; and n is 0 to 3 and catalysts made using such compounds.

Crystal structure and propene polymerization characteristics of bridged zirconocene catalysts

The synthesis, crystal structure and propene polymerization behaviour of four bridged zirconocene dichlorides is presented.All catalysts are capable of isotactic propene polymerization.Methyl substitutions at the 2-, 4- and 7-positions of the bridged bis(indenyl)zirconocene dichlorides were introduced.The methyl substituent in the 7-position of the indenyl ring induces a significant steric interaction with the bridging group.On comparison of the 2,4,7-methyl substituted catalysts with their unsubstituted counterparts, only the ethylidene bridged catalyst rac-1,2-ethylidene- bis(2,4,7-trimethyl-1-indenyl)zirconium dichloride (4) is forced into the optimum geometry for isotactic propene polymerization.Owing to the steric bulk at the bridge catalyst 4 is very rigid with respect to the movement of the indenyl rings and the metal centre thus produces highly isotatic polypropene even up to high polymerization temperatures.Molecular mechanics calculations and temperature-dependent NMR measurements demonstrate that catalyst 4 is not able to equilibrate between the λ and δ conformational state as the corresponding rac-1,2-ethylidene-bis(-1-indenyl)zirconium dichloride (3) catalyst does.In the case of the catalyst isopropyliden(3-tert-butyl)cyclopentadienyl-9-fluorenyl)zirconium dichloride (6) the substitution in the 3-position changes the symmetry from Cs to C1.This catalyst produces isoactic polypropylene but with a decreased polymerization activity.Keywords: Zirconocene; Homogeneous Ziegler-Natta catalysis; Propene polymerization; Molecular mechanics calculations