Org chem nomenclature, quick

2012-07-11 3:25 am
第一,今日本人無聊畫左以下一個molecule,但係畫左之後唔識name,請咁多位幫幫手name 左下面果舊野(要英文),唔該!


圖片參考:http://imgcld.yimg.com/8/n/HA00656648/o/701207100069313873412390.jpg



第二,順便想問下anhydride,-C(=O) - O - C(=O) - ,作為prefix 果陣係咩?




**可能有幫助既information
1) -C(=O) - O - C(=O) - 係一個functional group叫 acid anhydride
2) -COOH naming 既priority 先過 anhydride
3) prefix:
- C(=O) - : oxo-
-OH : hydroxy


Thank you very very much!

回答 (1)

2012-07-12 5:34 am
✔ 最佳答案
先答第二:
翻查過網上版的Blue Book, 沒有發現acid anhydride 要如何稱呼.

於是, 第一題唯有作弊了. 把整個份子輸入ChemDraw, 再以內置功能由結構轉換成名字.

圖片參考:http://imgcld.yimg.com/8/n/HA00075708/o/701207100069313873412400.jpg


acetic acid = ethanoic acid.

以此推斷, 應該是alkanoyloxy- , 然後對面的C=O 就當成是ketone, 叫作oxo- 了.
main chain 是左面的ethanoic acid, 2-位有ketone 叫2-oxo- ;
side chain 是右面的一揪, 最接近acid anhydride 的叫butanoyloxy , 右面的ketone 就在3-位 3-oxo- .


2012-07-16 22:01:22 補充:
Sorry that ChemDraw is (supposed) to be a proprietary software. One should (is supposed) to pay and buy the software. It is (supposed to be) illegal for re-distribution of it without permission.

You may contact me for more (legal) information. =]


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