Why is N more basic than P?

The electronegativity of the P atom is less than as compared with$N$, also the size of the$P$atom is bigger than that of N. hence the molecule $P{H_3}$ is less basic as compared with $N{H_3}$.

Which is more basic nch3 or nsih3?

Lone pair of electrons on N in N(SiH3)3 are used up in p-pie d-pie back bonding while in N(CH3)3 such back bonding is not possible due to the absence of vacant d-orbital in carbon. Therefore, N(CH3)3 is more basic than N(SiH3)3.

Why SiH3 3N is a weaker base than CH3 3N or why’N CH3 3 is more basic than N sime3 )?

In case of Trisilylamine (Sih3)3 N, the atom is sp2 hybridised and the lone pair is present in the 2p orbitaland it is transferred to empty d orbital of Si atom forming dpi – p pi bond. Thus the involvement of lone pair in d pi – p pi bond makes (Sih3)3N a weaker base than (ch3)3 N.

Why is P CH3 3 more nucleophilic than n33?

The CH3 groups in N(CH3)3 are much closer to one another than they are in P(CH3)3. The P electrons less hindered and an electrophile can approach them more easily.

Which n is more basic?

ANSWER: The lone pair on nitrogen (b) is the most basic.

Which heterocycle is more basic?

Quino[7,8-h]quinoline and phenanthroline are the most basic of all the heterocycles studied in this work in the gas phase, with GB values of 244.1 and 230.9 kcal mol–1, respectively.

Why is N CH3 3 more basic?

So the tiny 1s orbital can interact quite nicely with the lone pair electron in the 2p orbital of N and the bond is strong. So the protonated conjugate acid is stable and hence N(CH3)3 is way more basic than P(CH3)3.

Why is CH3 3N a base?

The dissociation of trimethylamine is shown below. From this, it shows that trimethylammonium is a weak base when it is dissolved in aqueous solution because it does not dissociate completely. Therefore, (CH3)3N ( C H 3 ) 3 N in an aqueous solution will be classified as weak base.

Why N CH3 3 is pyramidal but N SiH3 3 is planar?

In case of N(CH3)3, PΠ-PΠ bonding occur between N and C atom. thus N has sp3 hybridisation with pyramidal shape. But in case of N(SiH3)3, pπ-dπ bonding( back bonding) occur. thus N has sp2 hybridisation with planar shape.

Why N CH3 3 is a better electron pair donor?

Between NH3​ and PH3​,NH3​ is a better electron donor because the lone pair of electrons occupies sp3 orbital and is more directional.

Which is more nucleophilic CH3 3P or CH3 3N?

Polar aprotic solvents can stabilize cations by ion-dipole interactions, but not anions (nucleophiles); thus nucleophiles are more free to react with electrophilic carbon atoms in polar aprotic solvents. (d) (CH3)3P or (CH3)3N (CH3)3P is more reactive than (CH3)3N, since P is larger and more polarizable than N.