1,4-二碘代丁烷

1,4-二碘代丁烷

1,4-Diiodobutane

628-21-7

C4H8I2

309.91500

0.00000

2.63660

309.87200

n20/D 1.621(lit.)

透明淡棕色液体,强烈的气味

108-110°C/10mm

147-152 °C26 mm Hg(lit.)

6 °C(lit.)

2.35 g/mL at 25 °C(lit.)

insoluble

Stable under normal temperatures and pressures.

Store in a cool, dry place. Do not store in direct sunlight. Store in a tightly closed container.

EJ9200000

3

29033080

6.1(b)

S26-S37/39

III

2810

Xi

R36/37/38

2933990090

2933990090. 其他仅含氮杂原子的杂环化合物. 增值税率:17.0%. 退税率:13.0%. 监管条件:无. 最惠国关税:6.5%. 普通关税:20.0%

2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

<p>1.制法: 于装有搅拌器、回流冷凝器、温度计的反应瓶中,加入32.5g五氧化二磷,85%的正磷酸68mL,搅拌下冷至室温。加入碘化钾166g(1.0mol),22.5(0.25mol)新蒸馏的1,4-丁二醇<br>(2)(bp228～230℃或133～135℃/2.4kPa)。搅拌下于100～120℃反应4h。冷至室温,加入75mL水和130mL乙醚。分出乙醚层,加入25mL(10%)的硫代硫酸钠溶液脱色,用冷的饱和食盐水洗涤,无水流行美干燥。蒸出乙醚后,减压分馏,收集110℃/800Pa的馏分,得1,4-二碘丁烷<br>(1)①65g,收率84%。注:①也可以使用THF代替1,4-丁二醇。 </p>