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4,5-Diazafluoren-9-one

4,5-Diazafluoren-9-one Structure
4,5-Diazafluoren-9-one structure
CAS No.
50890-67-0
Chemical Name:
4,5-Diazafluoren-9-one
Synonyms
Dafo;5H-Cyclopenta[2,1-b:3,4-b']dipyridin-5-one;5H-Cyclopenta[1,2-b:5,4-b']dipyridin-5-one;AKOS BBS-00000188;4,5-DIAZAFLUOREN-9-O;4,5-Diaza-9-fluorenone;4,5-Diazafluoren-9-one;4,5-DIAZAFLUORENE-9-ONE;4,5-Diaza-9H-fluoren-9-one;4,5-Diazafluoren-9-one 97%
CBNumber:
CB0479035
Molecular Formula:
C11H6N2O
Molecular Weight:
182.18
MDL Number:
MFCD00046892
MOL File:
50890-67-0.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-09-12 18:48:21
Request For Quotation

4,5-Diazafluoren-9-one Properties

Melting point 214-217 °C (lit.)
Boiling point 396.3±17.0 °C(Predicted)
Density 1.387±0.06 g/cm3(Predicted)
storage temp. Sealed in dry,Room Temperature
solubility Soluble in dichloromethane, tetrahydrofuran, chloroform, benzene, toluene and polar organic solvents. Insoluble in diethyl ether and alkanes.
pka 1.22±0.20(Predicted)
form powder to crystal
color Light yellow to Yellow to Orange
λmax 340nm(H2O)(lit.)
InChI 1S/C11H6N2O/c14-11-7-3-1-5-12-9(7)10-8(11)4-2-6-13-10/h1-6H
InChIKey PFMTUGNLBQSHQC-UHFFFAOYSA-N
SMILES O=C1c2cccnc2-c3ncccc13
CAS DataBase Reference 50890-67-0
UNSPSC Code 12352100
NACRES NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H315-H319-H335
Precautionary statements  P261-P264-P271-P280-P302+P352-P305+P351+P338
target organs Respiratory system
PPE dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-37/39
WGK Germany  3
HS Code  29333990
Storage Class 11 - Combustible Solids
Hazard Classifications Eye Irrit. 2
Skin Irrit. 2
STOT SE 3
NFPA 704
1
2 0

4,5-Diazafluoren-9-one price More Price(38)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 379344 4,5-Diazafluoren-9-one 97% 50890-67-0 1g $274 2026-04-30 Buy
TCI Chemical D4255 4,5-Diazafluoren-9-one >98.0%(HPLC)(T) 50890-67-0 200mg $36 2026-04-30 Buy
Apolloscientific OR2898 4,5-Diaza-9H-fluoren-9-one 97% 50890-67-0 1g $24 2026-06-04 Buy
Apolloscientific OR2898 4,5-Diaza-9H-fluoren-9-one 97% 50890-67-0 5g $108 2026-06-04 Buy
AK Scientific J99546 5H-Cyclopenta[1,2-b:5,4-b']dipyridin-5-one 95% 50890-67-0 1g $12 2026-06-04 Buy
Product number Packaging Price Buy
379344 1g $274 Buy
D4255 200mg $36 Buy
OR2898 1g $24 Buy
OR2898 5g $108 Buy
J99546 1g $12 Buy

4,5-Diazafluoren-9-one Chemical Properties, Uses, Production

Chemical Properties

Yellow crystal

Uses

4,5-Diazafluoren-9-one behaves like cyclopentadienones and reacts with [Cp*Co(C2H4)2] to form air -stable sandwich-type complexes [Cp*Co(η4-2)].

Synthesis

o-Phenanthroline

66-71-7

4,5-DIAZAFLUOREN-9-ONE

50890-67-0

The general procedure for the synthesis of 4,5-diazafluoren-9-one from 1,10-phenanthroline was as follows: 1,10-phenanthroline (4.0 g, 22.2 mmol) and potassium hydroxide (KOH, 4.0 g, 71.3 mmol) were dissolved in water (250 mL), heated to boiling and maintained for 1 hour. Subsequently, a hot solution of potassium permanganate (KMnO4, 10.0 g, 63.3 mmol) dissolved in water (150 mL) was added slowly and dropwise over about 1 hour. The reaction mixture was continued to be boiled for 2 hours and then thermally filtered. After cooling the orange colored filtrate, it was extracted with chloroform. The organic extracts were combined and dried with anhydrous sodium sulfate (Na2SO4). After removal of solvent, the crude product was obtained. Further purification was carried out by silica gel column chromatography using acetone/petroleum ether (2:1, v/v) as eluent, resulting in pure 4,5-diazafluoren-9-one as a yellow solid (2 g, 50% yield).1H NMR (CDCl3) data were as follows: δ= 8.80 (d, 2H), 7.96 (d, 2H), 7.35 (d, 2H).

References

[1] Organic Letters, 2005, vol. 7, # 10, p. 1979 - 1982
[2] Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 2000, # 6, p. 971 - 980
[3] Doklady Chemistry, 2012, vol. 442, # 2, p. 50 - 56
[4] Polyhedron, 2015, vol. 87, p. 135 - 140
[5] Chemistry of Materials, 2012, vol. 24, # 4, p. 643 - 650

4,5-Diazafluoren-9-one Preparation Products And Raw materials

Raw materials

5-Nitro-1,10-phenanthroline o-Phenanthroline 1,7-PHENANTHROLINE Potassium permanganate Potassium hydroxide

Preparation Products

4,5-Diazafluoren-9-one Suppliers

Global Suppliers ( 163)
Supplier Tel Email Country ProdList Advantage
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
Alfa Aesar 400-6106006 saleschina@alfa-asia.com China 30103 84
Beijing HwrkChemical Technology Co., Ltd 89508211 18501085097 sales.bj@hwrkchemical.com China 9407 55
Beijing Ouhe Technology Co., Ltd 13552068683 13522913783 2355560935@qq.com China 11777 60
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078 sales@jingyan-chemical.com China 9963 60
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202 13764082696 info@hanhongsci.com China 42917 64
Sichuan Kulinan Technology Co., Ltd 400-1166-196 18981987031 cdhxsj@163.com China 11674 57
Tianjin heowns Biochemical Technology Co., Ltd. 400 638 7771 sales@heowns.com China 14412 57
Hunan Hui Bai Shi Biotechnology Co., Ltd. 0731-85526065 13308475853 ivy@hnhbsj.com China 7236 62
Springchem New Material Technology Co.,Limited +86-021-62885108 info@spring-chem.com China 2068 57
Supplier Advantage
J & K SCIENTIFIC LTD. 76
Alfa Aesar 84
Beijing HwrkChemical Technology Co., Ltd 55
Beijing Ouhe Technology Co., Ltd 60
JinYan Chemicals(ShangHai) Co.,Ltd. 60
Shanghai Hanhong Scientific Co.,Ltd. 64
Sichuan Kulinan Technology Co., Ltd 57
Tianjin heowns Biochemical Technology Co., Ltd. 57
Hunan Hui Bai Shi Biotechnology Co., Ltd. 62
Springchem New Material Technology Co.,Limited 57

View Latest Price from 4,5-Diazafluoren-9-one manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
5H-Cyclopenta[2,1-b:3,4-b']dipyridin-5-one pictures 2026-08-25 5H-Cyclopenta[2,1-b:3,4-b']dipyridin-5-one
50890-67-0
 $2.20-8.80 1KG 99% ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD
4,5-DIAZAFLUOREN-9-ONE pictures 2026-03-20 4,5-DIAZAFLUOREN-9-ONE
50890-67-0
 1KG 99% 20 mt Hebei Chuanghai Biotechnology Co., Ltd
4,5-DIAZAFLUOREN-9-ONE pictures 2019-09-02 4,5-DIAZAFLUOREN-9-ONE
50890-67-0
 1KG 98$ 200kg Career Henan Chemical Co

4,5-Diazafluoren-9-one Spectrum

4,5-DIAZAFLUOREN-9-ONE(50890-67-0)1HNMR

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1of2

4,5-DIAZAFLUOREN-9-O 4,5-DIAZAFLUORENE-9-ONE 4,5-Diazafluoren-9-one, 98+% 4,5-Diazafluoren-9-one 97% AKOS BBS-00000188 5H-PYRIDO[3',2':4,5]CYCLOPENTA[1,2-B]PYRIDIN-5-ONE 4,5-Diaza-9H-fluoren-9-one 97% 4,5-Diaza-9H-fluoren-9-one 4,5-Diaza-9-fluorenone 5H-Cyclopenta[2,1-b:3,4-b']dipyridin-5-one 3,13-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,5,10,12-hexaen-8-one 5H-Cyclopenta[1,2-b:5,4-b']dipyridin-5-one Dafo 4,5-Diazafluoren-9-one 50890-67-0 C11H6N2O N-Containing Others Heterocyclic Building Blocks Building Blocks Electronic Chemicals Heterocyclic Building Blocks N-Containing Others