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I'm not an expert teacher or lecturer of chemistry. I was only a student from SMA NEGERI 15 SURABAYA who had been one of the Bronze Medalist Participants of Olimpiade Sains Nasional X (2011) of Chemistry In Manado, North Sulawesi, 11 - 16 September 2011 and graduated in 2012. Now, I'm studying at Universitas Airlangga in Surabaya, Indonesia. I do love chemistry and I would like to help them who had difficulties in studying chemistry. That's why, please understand me if you found some misconcepts in my entries. Suggestions are always necessary in order to develop this blog. And I'm sorry because my English isn't so well.

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The Documents

Monday, June 20, 2011

Derivat Asam Karboksilat

Pengertian derivat disini adalah senyawa yang apabila direaksikan dengan air (dihidrolisis) akan membentuk kembali asam karboksilat.

Berikut adalah contoh – contoh derivat asam karboksilat:

1. Anhidrida Karboksilat


2. Ester


3. Karboksiamida


4. Klorokarboksilat


Apabila kita mengurutkan kereaktifannya, maka klorokarboksilat paling reaktif karena klorida pada senyawanya adalah senyawa penarik elektron dengan elektronegatifan yang kuat sehingga gugus klorida akan mudah terlepas (Bereaksi).

Kemudian anhidrida karboksilat karena terdapat 2 gugus penarik elektron. Selanjutnya adalah ester karena ester memiliki elektronegativitas (O) lebih besar dibanding karboksilamida (N) meski mereka berdua sama – sama dapat menyumbang elektron kepada senyawanya.

Untuk klorokarboksilat. Gugus kloro dapat diganti dengan halida yang lain sehingga yang paling reaktif adalah Florokarboksilat (EN F > EN Cl).

Sehingga dapat disimpulkan bahwa kereaktifan ditentukan oleh:
1. Gugus Penarik Elektron
2. Gugus Karbonil
3. Elektronegativitas.

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