反丁烯二腈

反丁烯二腈

(E)-but-2-enedinitrile

764-42-1

C4H2N2

78.07210

47.58000

0.58976

78.02180

1.458

棕色结晶固体

186°C

186 °C(lit.)

93-95 °C(lit.)

1.041 g/cm3

Stable. Incompatible with strong acids, strong bases, strong oxidizing agents, strong reducing agents.

LT2300000

3

6.1

S36/37/39-S45

II

UN 3439 6.1/PG 3

T

R23/24/25

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>由反丁烯二酸制得,反丁烯二酸的化学性质与顺丁烯二酸相似,反丁烯二酸加热至250-300℃转变顺丁烯二酸酐,反丁烯二酸也能生成一元及二元酯或酰胺,但不能生成一元酰氯而可生成二元酰氯。反丁烯二酸酯化生成反丁烯二酸二乙酯,再经酰胺化,脱水即得反丁烯二腈。<br>1.酰胺化将反丁烯二酸二乙酯冷至0℃,搅拌下慢慢加入氨水,加完后再搅拌4h,过滤,用少量水洗一次,晾干,得反丁烯酰胺[627-64-5]。<br>2.脱水将上述反丁烯酰胺与五氧化二磷混匀后,加热,减压蒸馏至无馏出物为止,得反丁烯二腈粗品。将粗品溶于苯中,摇动下倒入石油醚中,过滤,凉干即得成品。</p>

<p>用于有机合成。</p>