methyl is hydrophobic because it is non polar. the c-h bonds have little electronegativity difference I believe. water is polar, and nonpolar things don't tend to react or dissolve in polar substances.
The name for the CH3-Ch-CH3 alkyl group is isopropyl.
Difficult to draw here, but let's try to describe: Three methyl groups (CH3-) and one H- atom bonded to one central C atom, then you'll get something like this: . . . .H CH3-C-CH3 . . . .CH3
The name for CH3CH(CH3)CH(CH3)CH3 is 2,3-dimethylpentane.
1. hexane: CH3-CH2-CH2-CH2-CH2-CH32. 3-methylpentane: CH3-CH2-CH(CH3)-CH2-CH33. 2-methylpentane: CH3-CH(CH3)-CH2-CH2-CH34. 2,2-dimethylbutane: CH3-C(CH3(CH3))-CH2-CH3
Kb=[(Ch3)3 NH+][OH-] __________ [(Ch3)3 N]
The R group in alanine is a simple methyl group (CH3). This nonpolar, hydrophobic side chain is small and uncharged, making alanine a neutral, aliphatic amino acid.
CH3-C(CH3)2-CH3-C(CH3)2-CH3 , 2,2,4,4-tetramethyl pentane
CH3-C(CH3)2-CH3-C(CH3)2-CH3 , 2,2,4,4-tetramethyl pentane
The correct structure of 3-ethyl-3-methylhexane is: CH3-CH2-CH(CH3)-CH2-CH(CH3)-CH3
The name for the CH3-Ch-CH3 alkyl group is isopropyl.
Difficult to draw here, but let's try to describe: Three methyl groups (CH3-) and one H- atom bonded to one central C atom, then you'll get something like this: . . . .H CH3-C-CH3 . . . .CH3
CH3-CH2-CH3 is a gas Propane.
n-butane CH3-CH2-CH2-CH3 and isobutane CH3-CH(CH3)-CH3
CH3-C(Br)(CH3)-CH3 + H2O = CH3-C(OH)(CH3)-CH3 + HBr
The condensed formula for 2,3,3,4-tetramethylnonane is CH3-CH(CH3)-CH(CH3)-CH2-CH2-CH2-CH2-CH2-CH3.
CH3-CH(=O)-CH(CH3)-CH2-CH3
Serine, being hydrophilic, will be more likely to appear near the surface of a globular protein in solution, and alanine, being hydrophobic, will more likely appear near the centre of the protein. This illustrates the "hydrophobic effect", which is one of the effects that stabilizes the tertiary and quaternary structures of proteins. The hydrophobic effect is not due to an intramolecular force but the tendency of hydrophilic and hydrophobic amino acids to interact oppositely with water and segregate into surface and inner regions.