20615-64-9

Basic information

• Product Name: 9-Fluorenecarboxaldehyde
• Synonyms: 9H-fluorene-9-carbaldehyde;Fluorene-9-carboxaldehyde
• CAS NO: 20615-64-9
• Molecular Formula: C₁₄H₁₀O
• Molecular Weight: 194.23
• Mol File: 20615-64-9.mol
• Article Data: 17

Chemical Properties

• Boiling Point: 169-172 °C(Press: 2 Torr)
• Appearance: /
• Density: 1.253±0.06 g/cm3(Predicted)
• CAS DataBase Reference: 9-Fluorenecarboxaldehyde(CAS DataBase Reference)
• NIST Chemistry Reference: 9-Fluorenecarboxaldehyde(20615-64-9)
• EPA Substance Registry System: 9-Fluorenecarboxaldehyde(20615-64-9)

Safety Data

• Hazardous Substances Data: 20615-64-9(Hazardous Substances Data)

Upstream product

• 86-73-7 9H-fluorene 
• 109-94-4 formic acid ethyl ester 
• 60-29-7 diethyl ether 
• 917-58-8 potassium ethoxide 
• 17384-87-1 9-formylfluorene methyl hemiacetal 
• 24324-17-2 9-Fluorenylmethanol 
• 24252-72-0 9-formylfluorene oxime 
• 1136-56-7 9-(hydroxymethylene)fluorene 
• 107-31-3 Methyl formate 
• 4425-71-2 2-(9H-fluoren-9-ylidene)acetaldehyde 
• 119105-38-3 (9H-Fluoren-9-yl)-hydroxy-methanesulfonic acid anion 
• 111916-36-0 (9H-Fluoren-9-yl)-methanediol 
• 1176-09-6 9H,9'H-9,9'-bifluorene-9,9'-dicarbaldehyde 
• 64-19-7 acetic acid 

Downstream Products

• 1572-46-9 9-benzylfluorene 
• 15718-00-0 1-(9H-fluoren-9-ylidene)-2-phenylhydrazine 
• 106066-91-5 2-fluoren-9-yl-3-fluoren-9-ylidenemethyl-5,5-diphenyl-oxazolidine 
• 37390-50-4 N-(Fluorenyliden-⁽⁹⁾-methyl)-O,O-diphenyl-phosphorsaeureamid 
• 33201-76-2 Fluoren-9-ylidenemethyl-thiocarbamic acid O-phenyl ester 
• 100025-49-8 9-Benzoylaminomethylen-fluoren 
• 98635-52-0 9-<4-Nitro-anilinomethylen>-fluoren 
• 10509-51-0 N,N-Bis-Fluoren-9-ylidenamino-anilin 
• 33201-88-6 1-Fluoren-9-ylidenemethyl-3-phenyl-thiourea 
• 32501-56-7 9-cyclohexyl-9H-fluorene 
• 486-25-9 9-fluorenone 
• 1529-40-4 9H-fluorene-9-carbonitrile 
• 5209-24-5 1.1.5.5-Bis-biphenylen-penten-(1)-in-(3)-ol-(5) 
• 60160-60-3 (4-bromo-phenyl)-fluoren-9-ylidenemethyl-diazene 

Relevant articles and documents

Low-temperature heat capacity and standard molar enthalpy of formation of 9-fluorenemethanol (C14H12O)

Low-temperature heat capacities of the 9-fluorenemethanol (C 14H12O) have been precisely measured with a small sample automatic adiabatic calorimeter over the temperature range between T = 78 K and T = 390 K. The solid-liquid phase transition of the compound has been observed to be Tfus = (376.567 ± 0.012) K from the heat-capacity measurements. The molar enthalpy and entropy of the melting of the substance were determined to be ΔfusHm = (26.273 ± 0.013) kJ · mol-1 and ΔfusSm = (69.770 ± 0.035) J · K-1·mol-1. The experimental values of molar heat capacities in solid and liquid regions have been fitted to two polynomial equations by the least squares method. The constant-volume energy and standard molar enthalpy of combustion of the compound have been determined, ΔcU(C14H 12O, s) = -(7125.56 ± 4.62) kJ·mol-1 and ΔcHm°(C14H12 O, s) = -(7131.76 ± 4.62) kJ · mol-1 by means of a homemade precision oxygen-bomb combustion calorimeter at T = (298.15 ± 0.001) K. The standard molar enthalpy of formation of the compound has been derived, Δf Hm°(C14H 12 O, s) = -(92.36 ± 0.97) kJ · mol-1, from the standard molar enthalpy of combustion of the compound in combination with other auxiliary thermodynamic quantities through a Hess thermochemical cycle.

Preparation method of 9-fluorenecarboxaldehyde

The invention relates to the field of fine chemical intermediate synthesis, in particular to a preparation method of a chemical intermediate 9-fluorene formaldehyde, which comprises the following steps: adding industrial fluorene, metal alkoxide and ethyl formate into a solvent, and reacting at 30-80 DEG C for 0.5-10 hours to obtain 9-fluorene formaldehyde; and after the reaction is finished, cooling, carrying out acid quenching reaction, extracting, regulating the pH value to be less than 3 by using a water phase, separating out a solid, and recrystallizing to obtain a target product. The preparation method of 9-fluorene formaldehyde provided by the invention has the characteristics of safety, environmental protection and easy operation, the conversion rate of fluorene is high, the product purity is good, and a new way is provided for improving the utilization rate of industrial fluorene.

Strongly coupled Mn3O4-porous organic polymer hybrid: A robust, durable and potential nanocatalyst for alcohol oxidation reactions

Herein we describe a novel strategy for noble-metal-free Mn3O4@POP (porous organic polymer) hybrid synthesis by encapsulation of Mn3O4-NP in the interior cavity of a porous organic polymer which exhibited enhanced catalytic activity and stability for oxidation of diverse activated and nonactivated alcohols relative to the conventional catalysts to demonstrate the benefits of such a nanoarchitecture in heterogeneous nanocatalysis. The use of a non precious catalyst, tremendous recyclability (upto 15 catalytic runs) and exceptional stability make our system innovative in nature, addressing all the profound challenges in the noble-metal-free heterogeneous catalysts development community.

Cellulose supported manganese dioxide nanosheet catalyzed aerobic oxidation of organic compounds

Cellulose supported manganese dioxide nanosheets, as a heterogeneous bio-supported and green catalyst, were synthesized by soaking porous cellulose in a potassium permanganate solution. The prepared catalyst was used effectively for the oxidation of various types of alkyl arenes, alcohols and sulfides to their corresponding carbonyl and sulfoxide compounds, respectively in high yields using air as the oxidant at ambient pressure. The catalyst can be recycled and reused in five runs without any significant loss of efficiency. The mild reaction conditions for the oxidation of alcohols and sulfides, high yields, recyclability of the catalyst, and very easy workup procedure are other advantages of this catalyst.