2,5-Dibromothiophene

The 2,5-Dibromothiophene is an organic compound with the formula C₄H₂Br₂S. The IUPAC name of this chemical is 2,5-dibromothiophene. With the CAS registry number 3141-27-3, it is also named as Thiophene, 2,5-dibromo-. The product's categories are Thiophenes; Sulphur Derivatives; Thiophene & Benzothiophene; Metal Isotopes; Thiophens; Sulfur & Selenium Compounds; Halogenated Heterocycles; Heterocyclic Building Blocks; Thiophenes Building Blocks. Besides, it is a light yellow liquid, which should be stored in a cool and dry place at temperature of 5 - 20 °C. It is mainly used as pharmaceutical intermediates.

Physical properties about 2,5-Dibromothiophene are: (1)ACD/LogP: 3.55; (2)ACD/LogD (pH 5.5): 3.55; (3)ACD/LogD (pH 7.4): 3.55; (4)ACD/BCF (pH 5.5): 295.36; (5)ACD/BCF (pH 7.4): 295.36; (6)ACD/KOC (pH 5.5): 2041.18; (7)ACD/KOC (pH 7.4): 2041.18; (8)Polar Surface Area: 28.24 Å²; (9)Index of Refraction: 1.638; (10)Molar Refractivity: 40.01 cm³; (11)Molar Volume: 111.2 cm³; (12)Polarizability: 15.86×10^-24cm³; (13)Surface Tension: 47 dyne/cm; (14)Density: 2.174 g/cm³; (15)Flash Point: 99.4 °C; (16)Enthalpy of Vaporization: 42.76 kJ/mol; (17)Boiling Point: 209.5 °C at 760 mmHg; (18)Vapour Pressure: 0.292 mmHg at 25°C.

Preparation: this chemical can be prepared by thiophene. This reaction will need reagent benzene and bromine.

Uses of 2,5-Dibromothiophene: it can be used to produce [2,2';5',2'']terthiophene by heating. It will need reagent tetrakis-(triphenylphosphine)palladium(0), 1 M sodium bicarbonate and solvent 1,2-dimethoxy-ethane with reaction time of 4 hours. The yield is about 40%.

When you are using this chemical, please be cautious about it as the following:
It is harmful by inhalation and if swallowed and may cause sensitisation by skin contact. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Besides, this chemical is possible risk of irreversible effects and irritating to eyes, respiratory system and skin. When you are using it, wear suitable gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
(1)SMILES: Brc1sc(Br)cc1
(2)InChI: InChI=1/C4H2Br2S/c5-3-1-2-4(6)7-3/h1-2H
(3)InChIKey: KBVDUUXRXJTAJC-UHFFFAOYAE
(4)Std. InChI: InChI=1S/C4H2Br2S/c5-3-1-2-4(6)7-3/h1-2H
(5)Std. InChIKey: KBVDUUXRXJTAJC-UHFFFAOYSA-N