203070-78-4

Basic information

• Product Name: 9,9-bis(2-hydroxyethyl)fluorene
• Synonyms: 9,9-bis(2-hydroxyethyl)fluorene;2,2'-(9H-fluorene-9,9-diyl)diethanol;9H-Fluorene-9,9-diethanol
• CAS NO: 203070-78-4
• Molecular Formula: C17H18O2
• Molecular Weight: 254
• Mol File: 203070-78-4.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• Storage Temp.: Sealed in dry,Room Temperature
• CAS DataBase Reference: 9,9-bis(2-hydroxyethyl)fluorene(CAS DataBase Reference)
• NIST Chemistry Reference: 9,9-bis(2-hydroxyethyl)fluorene(203070-78-4)
• EPA Substance Registry System: 9,9-bis(2-hydroxyethyl)fluorene(203070-78-4)

Safety Data

• Hazardous Substances Data: 203070-78-4(Hazardous Substances Data)

Usage

General Description

9,9-bis(2-hydroxyethyl)fluorene is a chemical substance that belongs to the chemical class known as fluorenes, which are polycyclic aromatic compounds containing a fluorene moiety. This chemical is used mainly in the field of organic synthesis and materials science. It possesses two hydroxyl groups (-OH) attached to ethyl side chains, providing polar characteristics to the otherwise nonpolar fluorene core. Because of its molecular structure, it has potential application in the production of polymers, serving as monomer for polymerization processes. Its fluorescence properties also make it of interest in optoelectronic materials. As with all chemicals, proper handling and disposal methods must be adhered to ensure environmental safety.

Upstream product

• 86-73-7 9H-fluorene 
• 75-21-8 oxirane 

Relevant articles and documents

A 9,9- [...] ethanol preparation method (by machine translation)

The present invention provides a 9,9- [...] ethanol preparation method, in accordance with materials [...] than said first, ethylene oxide, sodium hydride, N, N-dimethyl formamide, to [...] N the, in-dimethylformamide N, nitrogen protection, to be completely dissolved after stirring, cooling, sodium hydride is added in batches, maintains the temperature at the 0-5 °C between, the stirring reaction, N the ethylene oxide, diluted N-dimethyl formamide in adding to the above-mentioned reaction vessel, heat insulation reaction; the reaction mixture is added to ice water quenching, then using ethyl acetate extraction, combined with the phase, washing, drying, after the filtration of the drying agent, water bath, adding activated carbon to decolorize the backflow, after filtering, and then turns on lathe does solvent, get crude; in the crude product is dissolved in toluene, the heating dissolves clear and then cooling, filtering, washing, drying, to obtain white crystal obtained 9,9- [...] ethanol. By changing the reaction conditions of the present invention, reduces the 9,9- [...] the manufacturing cost of the ethanol. (by machine translation)

Conformational control by quaternary centres: theory, database evidence and application to polymers

The conformational effects of the quaternary centre in (RCH2CH2)4Xq species are studied by molecular mechanics calculations on hydrocarbons, ammonium ions, and related species, and the results verified by data on quaternary ammonium ions from the Cambridge Structural Database. Prn4C and Prn4N+ have just two low-energy structures, with D2d or S4 symmetry. All other conformations suffer from g+g- non-bonding interactions and will be populated to the extent of q-CH2 and the next set of torsions, -CH2-CH2-CH2-Xq, but the third set of torsions away from the quaternary centre is unaffected. Two competitive mechanisms for interconversion of the D2d and S4 conformations are proposed on the basis of molecular mechanics calculations. Polymers [(RCH2CH2)2C(CH2)2]n and [(RCH2CH2)2C(CH2)3]n are strain-free with controlled conformations for the -(CH2)2- and -(CH2)3- segments. In polymers containing simple alkyl side chains, there are two energetically similar conformations associated with the D2d local structure which have aaaa and ag+/-g+/-a torsion angle sequences for the polymer chain, and two comparable sequences ag+/-aa and ag+/-g+/-a associated with S4 local symmetry. Poly[(1,1-di-R)butane-1,4-diyl]s (R=Et,Pr,Bu and PhCH2CH2) have been prepared by ring opening metathesis polymerisation of 3,3-dialkylcyclobutenes, followed by diimide reduction, and their physical properties are in accord with these predictions. More highly structured side groups can act as extra conformational control elements, and the preparation of monomers and some polymers with these extra features is reported. Planar aromatic side groups like fluorene favour aaaa conformations, cyclohexyl side groups disfavour aaaa, but do not strongly discriminate between ag+/-aa and ag+/-g+/-a, adamantane side groups strongly favour ag+/-g+/-a, and a chiral ag+aa sequence is favoured for a polymer from (1R,2R,5R,7R)-2,8,8-trimethyltricyclo[5.1.1.02,5]non-3-ene, itself derived from α-pinene. Studies directed at preparing some structurally-related ketal polymers and a potential covalent ketal network are also described.