1,4-Dibromo-2,5-dimethoxybenzene
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1,4-Dibromo-2,5-dimethoxybenzene
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CAS No:
2674-34-2
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Formula:
C8H8Br2O2
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Chemical Name:
1,4-Dibromo-2,5-dimethoxybenzene
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Synonyms:
2,5-Dimethoxy-1,4-dibromobenzene;2,5-Dibromo-1,4-dimethoxybenzene;1,4-Dimethoxy-2,5-dibromobenzene;1,4-DIBROMO-2,5-DIMETHOXYBENZENE;1,4-Dibromo-2,5-dimethoxybenzene,99%;1,4-Dibromo-2,5-dimethoxybenzene,98+%
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CAS No:
1,4-Dibromo-2,5-dimethoxybenzene Basic Attributes
295.958
293.889099
27013
DTXSID00282647
2909309090
Characteristics
18.5
3.2
white crystalline powder.
1.7±0.1 g/cm3
144-147 °C
290.3°C at 760 mmHg
116.1±24.4 °C
1.561
Insoluble in water.
0.00364mmHg at 25°C
Safety Information
NONH for all modes of transport
3
R36/37/38
S37/39-S26-S36
Xi:Irritant;
P261-P305 + P351 + P338
H315-H319-H335
|Warning|H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]|P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, and P501|Aggregated GHS information provided by 45 companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
1,4-Dibromo-2,5-dimethoxybenzene Use and Manufacturing
Preparation of 2, 5-dibromo-1 , 4-dimethoxybenzene (2); [00103] In a one liter round-bottom flask, a solution of bromine (35.2 g, 220 mmol) in chloroform (50 ml) was added dropwise to a solution of 1 , 4- dimethoxybenzene (13.8 g, 100 mmol) in chloroform (400 ml) under 0In a 250 ml reaction flask, 20.0 g (0.145 mol, 1.0 eq) of hydroquinone dimethyl ether and 55 ml of glacial acetic acid were added and dissolved by ultrasonic; A solution of 15 ml of Br2 (0.290 mol, 2.0 eq) and 15 ml of glacial acetic acid was added dropwise at room temperature. After 1.5 hours, the mixture was stirred at room temperature for 2.5 h. Placed in the upper refrigerator to 10 below the temperature (not to acetic acid curing) filter; and petroleum ether washing filter cake to give a white solid, vacuum drying and then weight 35.6g, the yield of 83.6percent.1, 4-dimethoxybenzene (1.66 g, 12.0 mmol) was dissolved in 25 mL glacial acetic acid and cooled in an ice bath. Bromine (1.3 mL, 25 mmol) was carefully added. The cooling bath was removed and the reaction was stirred for 16 h and then poured over ice. The reaction mixture was extracted 3 x with 100 mL of CHClTo a solution of 1, 4- dimethoxybenzene Q-8 (7.5 g, 53.57 mmol) in acetic acid (25 mL) was added a solution of bromine (17.4 g, 108.9 mmol) in acetic acid (5 mL) at room temperature. After stirring for 2h, the solution was cooled to 10 General procedure: To a stirred solution of starting compound (0.5–1.2 mmol) in DMF–H
Computed Properties
Molecular Weight:295.96
XLogP3:3.2
Hydrogen Bond Acceptor Count:2
Rotatable Bond Count:2
Exact Mass:295.88706
Monoisotopic Mass:293.88910
Topological Polar Surface Area:18.5
Heavy Atom Count:12
Complexity:127
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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1,4-Dibromo-2,5-dimethoxybenzene
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