Draw the condensed structure of the following compounds: 1. 2-bromo-3-chloro-4,4-dimethylpentanal, 2. 2,3-dihydroxybutanal, 3. 3-amino-2-methylpentanoic acid, 4. 4-methylhex-2-ene, 5. 2,4,6-tribromophenol

Here are the condensed structures for the given compounds:

I) 2-bromo-3-chloro-4,4-dimethylpentane
The parent chain is pentane, which has 5 carbon atoms. There is a bromo group at C2, a chloro group at C3, and two methyl groups at C4.

$$\text{CH}_{3}\text{CH(Br)CH(Cl)C(CH}_{3}\text{)}_{2}\text{CH}_{3}$$

II) 2,3-dihydroxybutan-1-ol
The parent chain is butane, which has 4 carbon atoms. There are three hydroxyl (-OH) groups: one at C1, one at C2, and one at C3.

$$\text{HOCH}_{2}\text{CH(OH)CH(OH)CH}_{3}$$

III) 3-amino-2-methoxypentanoic acid
The parent chain is pentanoic acid, which has 5 carbon atoms with a carboxylic acid group (-COOH) at C1. There is an amino group (-NH$_{2}$) at C3 and a methoxy group (-OCH$_{3}$) at C2.

$$\text{CH}_{3}\text{CH}_{2}\text{CH(NH}_{2}\text{)CH(OCH}_{3}\text{)COOH}$$

IV) 4-methylhex-2-ene
The parent chain is hex-2-ene, which has 6 carbon atoms with a double bond between C2 and C3. There is a methyl group (-CH$_{3}$) at C4.

$$\text{CH}_{3}\text{CH=CHCH(CH}_{3}\text{)CH}_{2}\text{CH}_{3}$$

V) 2,4,6-tribromophenol
Phenol is a benzene ring with an -OH group. The carbon bearing the -OH group is C1. There are bromo groups at positions 2, 4, and 6.

$$\text{BrC}_{6}\text{H}_{2}\text{(OH)Br}_{2} \quad \text{or, more explicitly:} \quad \text{C}_{6}\text{H}_{2}\text{(OH)(Br)}_{3}$$

(This is a common way to represent substituted benzene rings in condensed form, indicating the number of hydrogens and substituents on the ring. A more detailed condensed structure would show the ring carbons and their attachments, but for a benzene derivative, the above is often accepted.)

Here are the final answers:

• I) $\boxed{\text{CH}_{3}\text{CH(Br)CH(Cl)C(CH}_{3}\text{)}_{2}\text{CH}_{3}}$
• II) $\boxed{\text{HOCH}_{2}\text{CH(OH)CH(OH)CH}_{3}}$
• III) $\boxed{\text{CH}_{3}\text{CH}_{2}\text{CH(NH}_{2}\text{)CH(OCH}_{3}\text{)COOH}}$
• IV) $\boxed{\text{CH}_{3}\text{CH=CHCH(CH}_{3}\text{)CH}_{2}\text{CH}_{3}}$
• V) $\boxed{\text{C}_{6}\text{H}_{2}\text{(OH)(Br)}_{3}}$