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Date: 10-7-2018
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Date: 30-9-2020
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Date: 28-8-2018
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Aromatic Ions
Carbanions and carbocations may also show aromatic stabilization. Some examples are:
The three-membered ring cation has 2 π-electrons and is surprisingly stable, considering its ring strain. Cyclopentadiene is as acidic as ethanol, reflecting the stability of its 6 π-electron conjugate base. Salts of cycloheptatrienyl cation (tropylium ion) are stable in water solution, again reflecting the stability of this 6 π-electron cation.
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أمراض منتصف العمر.. "أعراض خطيرة" سببها نقص المغنيسيوم
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لماذا تتناقص أعداد النحل عالميا؟
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ممثل المرجعية العليا: العتبة الحسينية تخطط لإنشاء مراكز متخصصة للكشف المبكر عن (سرطان الثدي) بعموم العراق
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