Which of the following is more basic than CH3NH2 in?
Expert-Verified Answer
(CH₃)₂NH is most basic most basic among all others. Basicity is the ability of the atom to donate its lone pair of electrons. In aniline nitrogen is directly attached with the benzene ring which leads to the delocalization of lone pair of electrons of nitrogen atom in the benzene ring.
Therefore, option (C) dimethylamine, is correct.
On the other hand, in aniline lone pair of electron on the nitrogen atom is delocalised over the benzene ring due to resonance and thus making it less available for donation. That is why CH3−NH2 is more basic than C6H5−NH2.
Due to the presence of one +I effect containing CH3 group in CH3NH2 the electron density over the N atom is more and hence it readily donates it electron towards proton showing more basicity than NH3 in which there is no group attached.
As the number of methyl groups increases, the extent of hydration decreases due to steric hindrance. Greater is the extent of hydration, greater is the stability of ion and greater is the basic strength of amine.
CH3NH2 C H 3 N H 2 is a stronger base than CH3OH C H 3 O H . Nitrogen and Oxygen both have lone pairs to donate, so both can act as base but Nitrogen is less electronegative than Oxygen, so it has more tendency to donate its lone pair of electrons as compared to Oxygen. Hence, CH3NH2 C H 3 N H 2 is a stronger base.
Methyl amine is the strongest base.
In both C6H5NH2 and C6H5N(CH3)2 lone pair of electrons present on N-atom is delocalized over the benzene ring but C6H5N(CH3)2 is more basic due to +1 effect of two –CH3 groups.
Which is more basic `NH_(3) or CH_(3)NH_(2)`? `CH_(3)- NH_(2)` is more basic than ammonia .
A 0.45 M aqueous solution of methylamine has a pH of 12.10....
Is CH3NH2 least basic?
Complete step by step answer:
We know that ammonia is a weak base as it has a lone pair of electrons in its nitrogen but it is stronger base than phenylamine and weaker base than methyl and ethyl amine.
As Methyl group is Electron Releasing group (Inductive Effect) it forces the lone pair of amine to be a better Lewis base. More the number of methyl groups or Electron Releasing groups more is basicity, hence ethyl amine is more basic than methyl amine.
While in CH3CH2—NH2, ethyl group is electron releasing makes the amine more basic than CH3CONH2.
NH3 is more soluble in water. as ammonia has the ability to form hydrogen bonds. When the hydrogen bonds between water molecules are broken, they can be replaced by equivalent bonds between water and ammonia molecules.
The order of basic strength in case of methyl substituted amines in aqueous solution is as follows: (CH3)2NH>CH3NH2>(CH3)3N>NH3.
Order of basicity: Cl- (weakest base) < CH3S- < (CH3)2P- (strongest base). Order of acidity: HCl (strongest acid) > CH3SH > (CH3)2PH (weakest acid). The conjugate base of CH3CH2NH2 (ethylamine) has a single resonance contributor, whereas the conjugate base of the amide has two resonance contributors.
And finally, CH3OH is more acidic than CH3NH2, because the conj bases have the negative charge on the O and the N respectively. O is more electronegative, therefore prefers the negative charge > nitrogen making CH3O- the more stable conjugate base and thus, CH3OH the stronger acid.
Methylamine CH3NH2 C H 3 N H 2 is a stronger nucleophile than methanol CH3OH C H 3 O H . Nucleophilicity is based upon the tendency to donate electrons. As nitrogen is less electronegative than oxygen. So, it can donate electrons more easily than oxygen.
Solution : `CH_NH_2` is a stronger base than `C_6H_5NH_2`. The +I effect of methyl group increase electron density on nitrogen in `CH_3NH_2` and makes it a stronger base. In aniline the lone pair on nitrogen is delocalised with the benzene ring.
Hence, this lone pair can be readily donated, and hence, benzylamine is the strongest base among the given bases.
Which of the following is the strongest base NH3 c6h5nh2 or CH3NH2?
Hence, the correct option is A i.e. ( CH 3 ) 2 NH is the strongest base in an aqueous solution.
Therefore the basicity of C6H5NH2 is lower than that of C2H5NH2.
OR a) CH3CONH2 is a weaker base than CH3CH2NH2.
Methylamine is a reasonably strong base as bases go (pKB=3. 36). It is also a potent nucleophile. It is also incredibly smelly.
Answer and Explanation: It is given that Methylamine, CH3NH2 C H 3 N H 2 acts as a weak base in water. The property of a base is to donate a lone pair of electrons or to accept protons. So, methylamine reacts with water by accepting a proton from it.
(CH3)2NH is more basic than (CH3)3N in an aqueous solution. The order of basic strength of aliphatic amines in the aqueous phase is based on the following factors: Steric factor: Alkyl group is larger than hydrogen atom that causes steric hindrance to attack of acid.
As Methyl group is Electron Releasing group (Inductive Effect) it forces the lone pair of amine to be a better Lewis base. More the number of methyl groups or Electron Releasing groups more is basicity, hence ethyl amine is more basic than methyl amine.
CH₃NH₂ is more basic than CH₃CN because of the high negativity of sp hybridized carbon in the latter. A lewis base is a compound that can act as an electron donor. In CH₃NH₂, the nitrogen atom is attached to an sp³ hybridized carbon atom.