IB课程的EE该怎么选科，附EE范文整理.

Figure 2：Acetic Anhydride

As have discussed in the introduction,acetic anhydride exhibits numerous hazardous effects and

can be used to produce heroin.Additionally,since it is a Category IVsubstance-which refers to a group ofstrictly regulated chemicals that can be used to produce illicit narcotics in Thailand-the compound is not an ideal candidate for a green synthesis and thus prompted me to look for possible replacements. Observing that compounds must contain the acetyl group,I found two possible acetic anhydride replacements:acetyl chloride(Figure 3)and acetic acid (Figure 4). The acetyl groups are highlighted in red.

However, after further investigation,I found out that acetyl chloride like acetic anhydride,is also a Category IV substance.Being category IV substances they are illegal for normal uses in Thailand(Chaninat).While quantitative conclusions of these two substances could not be drawn.