Read More
Date: 10-5-2017
2643
Date: 26-2-2016
4637
Date: 1-8-2018
1163
|
Aldehydes (R-CHO) take the suffix “-al“. If other functional groups are present, the chain is numbered such that the aldehyde carbon is in the “1” position, unless functional groups of higher precedence are present.
If a prefix form is required, “oxo-” is used (as for ketones), with the position number indicating the end of a chain: CHOCH2COOH is 3-oxopropanoic acid. If the carbon in the carbonyl group cannot be included in the attached chain (for instance in the case of cyclic aldehydes), the prefix “formyl-” or the suffix “-carbaldehyde” is used: C6H11CHO is cyclohexanecarbaldehyde. If an aldehyde is attached to a benzene and is the main functional group, the suffix becomes benzaldehyde.
|
|
مخاطر خفية لمكون شائع في مشروبات الطاقة والمكملات الغذائية
|
|
|
|
|
"آبل" تشغّل نظامها الجديد للذكاء الاصطناعي على أجهزتها
|
|
|
|
|
تستخدم لأول مرة... مستشفى الإمام زين العابدين (ع) التابع للعتبة الحسينية يعتمد تقنيات حديثة في تثبيت الكسور المعقدة
|
|
|