aldehyde

A class of organic compound with the formula of R CHO, with the R being an organic functional group.
The most common aldehyde is formaldehyde, but the more complex ones, such as benzaldehyde, is found in almond oil.
by chemguide August 10, 2019
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imide

Amide but with one more carbonyl group. It is not basic and if the nitrogen is bonded to H, even sodium hydroxide can deprotonate it.
Imides have very low pKa values, and is not basic at all.
by chemguide August 10, 2019
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methyl orange

A pH indicator (most commonly) used in acidic conditions.
In acidic conditions methyl orange is red but in neutral / basic conditions it is yellow.
by chemguide August 12, 2019
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theophylline

A dimethyl derivative of xanthine, structurally similar to theobromine.
Theophylline is used in therapy for respiratory diseases.
by chemguide August 12, 2019
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Aromatic compound

some kind of compounds containing conjugated double bonds, like benzene.
According to Huckel's rule, aromatic compound needs following properties:
-The structure is planar (no sp3 carbons)
-There is a cyclic ring in the structure
-Has 4n+2 electrons in the pi system
by chemguide August 12, 2019
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chemophobia

The fear of chemistry/ chemicals. The actual truth is that chemicals are everywhere, including water. Unfortunately, people make 'chemical-free' stuffs (which is wrong). This problem, therefore, should be fixed.
Just see how strong your chemophobia is.
Do you know that dihydrogen monoxide is now found in every water source? Its gas and solid state can burn people! And it is the main component of acid rain! You want to ban it?
Actually it is water.
by chemguide August 12, 2019
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Cyclopentadiene

An hydrocarbon compound that is basically violating being a hydrocarbon. Its pKa value is only 16, making it as acidic as water.
Its structure is a cyclopentane ring with 2 double bonds.
The reason for cyclopentadiene to be such acidic is because of its ionic structure. It has an aromatic anionic structure, making it extremely stable.
by chemguide August 12, 2019
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