| Identification | Back Directory | [Name]
4,7-Dibromo-benzofurazan
4,7-Dibromo-benzofurazan ,99% | [CAS]
54286-63-4 | [Synonyms]
BO-2Br
2,1,3-Benzoxadiazole,4,7-dib
2,1,3-Benzoxadiazole,4,7-dibroMo-
4,7-dibroMobenzo[c][1,2,5]oxadiazole
2,1,3-Benzoxadiazole,4,7-dibromo-benzofurazan
4,7-DibroMo-benzofurazan 4,7-DibroMo-benzofurazan
4,7-Dibromo-benzofurazan
4,7-Dibromo-benzofurazan ,99% | [Molecular Formula]
C6H2Br2N2O | [MDL Number]
MFCD02114623 | [MOL File]
54286-63-4.mol | [Molecular Weight]
277.901 |
| Chemical Properties | Back Directory | [Melting point ]
113 °C | [Boiling point ]
312.4±45.0 °C(Predicted) | [density ]
2.220±0.06 g/cm3(Predicted) | [storage temp. ]
Sealed in dry,Room Temperature | [solubility ]
soluble in Toluene | [form ]
powder to crystal | [pka]
-4.27±0.50(Predicted) | [color ]
White to Yellow to Orange | [InChI]
InChI=1S/C6H2Br2N2O/c7-3-1-2-4(8)6-5(3)9-11-10-6/h1-2H | [InChIKey]
ZUGAIWASFADONS-UHFFFAOYSA-N | [SMILES]
N1=C2C(Br)=CC=C(Br)C2=NO1 |
| Hazard Information | Back Directory | [Synthesis]
Benzo[c][1,2,5]oxadiazole (2.5 g, 21 mmol) was added as raw material, iron powder (0.23 g, 4.2 mmol) was added and heated to 90°C to melt. Subsequently, bromine (3.2 ml, 62 mmol) was slowly added dropwise to the molten liquid and the reaction mixture was refluxed for 2 hours. Upon completion of the reaction, the resulting solution was poured into ice water and a precipitate was precipitated and collected by filtration. The precipitate was mixed with aqueous NaHCO3 solution, stirred for 15 min and filtered again. Purification by fast chromatography (hexane/EtOAc 9:1) afforded 4,7-dibromobenzofurazan as an orange solid (1.5 g, 25% yield). The product was characterized as follows: melting point 88-92 °C; IR spectra (thin film method, cm-1 ) 1514, 1344, 1201, 1026, 954, 871, 841; 1H NMR (500MHz, CDCl3) δ 7.51 (2H, s, Ar-H); 13C NMR (126MHz, CDCl3) δ 149.6 (C=N), 134.4 (C=N), 134.4 (C=N), 134.4 (C=N). ), 134.4 (Ar-C), 108.9 (ipso-Ar-C); mass spectra (EI) m/z 280 ([81Br,81Br] M+, 6%), 278 ([81Br,79Br] M+, 8%), 276 ([79Br,79Br] M+, 6%), 250 (5%), 248 (10%), 246 (7%) , 197 (5%). All data are in agreement with literature reports. | [References]
[1] Journal of Materials Chemistry C, 2015, vol. 3, # 5, p. 973 - 976
[2] New Journal of Chemistry, 2012, vol. 36, # 3, p. 550 - 553
[3] Journal of the American Chemical Society, 2008, vol. 130, # 2, p. 732 - 742
[4] Journal of Materials Chemistry C, 2015, vol. 3, # 35, p. 9145 - 9153
[5] Patent: WO2009/34396, 2009, A2. Location in patent: Page/Page column 91-92 |
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