Captan is a dicarboximide fungicide. It
is mainly used for horticultural crops.
- IUPAC: N-(trichloromethlythio) cyclohex-4-ene-1,2, dicarboximide
- Chemical formula: C9H8Cl3NO2S
- Molecular weight: 300.61 g mol-1
- Melting point: 174 degrees Celsius
- Boiling point: decomposes before it boils
- Solubility in water: at 20 degrees Celsius has a 5.2 value (low)
- Intermolecular forces present: Hydrogen bonds are located at each point of the carbon rings except for the 3 points that have oxygen and nitrogen . There are some polar bonds between the oxygens and carbons, and the nitrogen and sulfur. The oxygen carbon bonds cancel each other out but the nitrogen and sulfur make the molecule slightly polar. All these polar bonds cause dipole-dipole intermolecular forces. There are also dispersion forces at play in this molecule.
Based on this statement "Hydrogen bonds are located at each point of the carbon rings except for the 3 points that have oxygen and nitrogen" it appears you need to review the concept of hydrogen bonding again!
ReplyDeleteAly,
ReplyDeleteHere is your question.
A) In the topic of equilibrium constants what are forms of matter do you not take into consideration for the equation?
B) Relate pKa to pKb.
This question was relevant to what we just learned in chemistry. I think this was a good review question and if you understood the concept it was relatively easy.
ReplyDeleteAnswer:
A) Solid, liquid, and gases are not considered when looking at equilibrium constants dealing with acid and bases. Only aqueous solutions. When looking at gas equilibriums such as Kp and Kc, only the matter in gas phase is used.
B) Conjugate acid-base pairing is Ka X Kb= Kw by taking the logarithm of both sides pKa+pKb=14
Source:
Tro, Nivaldo J. "Aqueous Ionic Equilibrium." Chemistry: A Molecular Approach. Upper Saddle River, NJ: Pearson Prentice Hall, 2011. 714+. Print.
Sort of a simplistic response to some low-threshold (not highly effective???) questions.
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