73220-53-8

Basic information

• Product Name: 9-(CHLORODIPHENYLSILYL)-9H-FLUORENE
• Synonyms: 9-(CHLORODIPHENYLSILYL)-9H-FLUORENE
• CAS NO: 73220-53-8
• Molecular Formula: C₂₅H₁₉ClSi
• Molecular Weight: 382.96
• Mol File: 73220-53-8.mol
• Article Data: 6

Chemical Properties

• Boiling Point: 514.1 °C at 760 mmHg
• Flash Point: 233 °C
• Appearance: /
• Density: 1.22 g/cm³
• Vapor Pressure: 3.61E-10mmHg at 25°C
• Refractive Index: 1.669
• CAS DataBase Reference: 9-(CHLORODIPHENYLSILYL)-9H-FLUORENE(CAS DataBase Reference)
• NIST Chemistry Reference: 9-(CHLORODIPHENYLSILYL)-9H-FLUORENE(73220-53-8)
• EPA Substance Registry System: 9-(CHLORODIPHENYLSILYL)-9H-FLUORENE(73220-53-8)

Safety Data

• Hazardous Substances Data: 73220-53-8(Hazardous Substances Data)

Usage

General Description

9-(Chlorodiphenylsilyl)-9H-fluorene is a chemical compound with the molecular formula C29H21ClSi. It is a derivative of fluorene, a polycyclic aromatic hydrocarbon, which is commonly used in the production of OLEDs and organic semiconductors. The presence of a chlorodiphenylsilyl group in this compound gives it unique chemical and physical properties, making it useful as a building block in organic synthesis and materials science. 9-(CHLORODIPHENYLSILYL)-9H-FLUORENE is often utilized in the development of advanced materials for electronic devices, such as organic light-emitting diodes (OLEDs), organic field-effect transistors (OFETs), and organic photovoltaics (OPVs). Its unique structure and properties make it valuable in the field of organic electronics and materials engineering.

InChI:InChI=1/C25H19ClSi/c26-27(19-11-3-1-4-12-19,20-13-5-2-6-14-20)25-23-17-9-7-15-21(23)22-16-8-10-18-24(22)25/h1-18,25H

Upstream product

• 86-73-7 9H-fluorene 
• 80-10-4 diphenylsilyl dichloride 
• 82438-50-4 9-fluorenyllithium 

Downstream Products

• 347423-47-6 1-Cyclopentadienyl-1,1-diphenyl-1-(9-fluorenyl)silane 
• 654055-16-0 (9-fluorenyl)-1-[(2-methyl-4-phenyl)indenyl]diphenylsilane 
• 654055-10-4 (9-fluorenyl)-1-[(3-tert-butyl)indenyl]diphenylsilane 
• 162289-97-6 cyclopentadienyl(fluoren-9-yl)diphenylsilane 
• 73220-59-4 (9-bromo-9-fluorenyl)chlorodiphenylsilane 
• 73220-57-2 9-Fluorenyldiphenylsilanol 
• 73220-55-0 9-Fluorenyldiphenylsilan 
• 1836-87-9 9-Benzylidene-9H-fluorene 
• 73220-56-1 9-Fluorenyl(4-methylphenylsulfonyl)diphenylsilan 
• 73220-58-3 Ethoxy-9-fluorenyldiphenylsilan 

Relevant articles and documents

In Situ Activation: Chances and Limitations to Form Ultrahigh Molecular Weight Syndiotactic Polypropylene with Metallocene Dichlorides

Fluorenyl cyclopentadienyl Cs-symmetric ansa-metallocene (M = Zr, Hf) complexes I-IV featuring different bridging motifs (C and Si) were synthesized and subsequently examined in the syndiospecific coordinative polymerization of propylene. All complexes were activated in situ with triisobutylaluminum (TIBA) and [Ph3C][B(C6F5)4] (TrBCF) in order to highlight the benefits of this in situ activation, resulting in a significantly higher molecular weight and a significantly increased productivity in comparison to methylaluminoxane (MAO). The isopropylidene-bridged zirconocene Ia (ZrCl2[Me2C(η5-Flu)( η5-Cp)]) exhibited a high productivity (80000 kgPP (molcat h)-1) and stereoregularity ([rrrr] up to 93%) with a moderate molecular weight of polypropylene (PP), whereas the polymerization with the corresponding hafnocene Ib (HfCl2[Me2C(η5-Flu)( η5-Cp)]) resulted in a lower productivity and stereoregularity but yielded ultrahigh molecular weight polypropylene (Mw = 1100 kg mol-1). The backbone in II (HfCl2[Ph2C(η5-Flu)( η5-Cp)]) was associated with a higher productivity and molecular weight, while the syndiotacticity was not affected. In contrast, SC-XRD revealed a reduced dihedral angle and D value for Si-bridged hafnocenes III (HfCl2[Me2Si(η5-Flu)( η5-Cp)]) and IV (HfCl2[Ph2Si(η5-Flu)( η5-Cp)]), resulting in a more constrained geometry of the catalyst. This led to an increased molecular weight, while the productivity as well as the syndiotacticity decreased due to these structural parameters. Activation of Ib and II-IV with n-octyl-modified methylaluminoxane (MMAO) resulted in a lower molecular weight of the polymer, because the transfer of the growing polymer chain onto the Al center was enhanced. Nevertheless, the stereoregularity of MMAO-activated catalysts was slightly increased, probably due to a coordination of the ill-defined MMAO anion during the polymerization. DSC analysis exposed for syndiotactic polypropylene (sPP) produced by the highly active zirconocene Ia a defined melting transition (Tm up to 145.2 °C), whereas TIBA/TrBCF-activated hafnocenes Ib and II-IV gave polymers with no observable Tm value.

ansa-metallocenes with a Ph2Si bridge: Molecular structures of HfCl2[Ph2Si(η5-C13H8) (η5-C5H4)] and HfCl2[Ph2Si(C13H9)(η5 -C5H4)]2

A mixture of rac- and meso-HfCl2[Ph2Si(η5-C9H6 )2] was synthesized by treatment of HfCl4 with the dilithium salt of di(1H-inden-1-yl)diphenylsilane. These complexes were isolated after fractional crystallization in 15.5 and 8.5% yields, respectively. A sterically strained ansa complex HfCl2[Ph2Si(η5-C13H8) (η5-C5H4)] was synthesized in 62% yield by treatment of HfCl4 with the dilithium salt of cyclopentadienyl(fluoren-9-yl)diphenylsilane. Both this compound, and the by-product of reaction, HfCl2[Ph2Si(C13H9)(η5 -C5H4)]2, were characterized by crystal structure analysis.

An olefin polymerization catalyst and a process for preparing olefin polymer

An olefin polymerization catalyst comprising:, ???(A-1) a Group IVB transition metal compound of formula (I), and, ???(B)???(B-1) an organoaluminum oxy-compound, and/or, ??????(B-2) a compound which reacts with the transition metal compound (A-1) to form an ion pair, wherein, inter alia, at least one R1is aryl, arylalkyl, arylalkenyl or alkylaryl or two R1s form a ring.