[Winga]

Base:
Me₃N, NH₃, NF₃

Which one is the most basic of the three?
Me₃N or NH₃?

[hmx9123]

Have you attempted this?  What were your findings or initial thoughts?

[Winga]

According to my lecture notes, by using inductive effect,

the basicity in descending order:
Me₃N > NH₃ > NF₃

I wonder that H is less electronegative than C (from Me group), but why NH₃ is less basic than Me₃N.

I know that Me is an e- donating group, but the donation should be through hyperconjugation, right?
There is no empty p-orbital in N and it is sp3 hybridized.

[Mitch]

Its an inductive effect not a hyperconjugation effect.

[Winga]

Without hyperconjugation, as C is more electronegative than H, the methyl groups should donate less e- density to N than that of H, so Me₃N is less basic than NH₃, am I right?

[maxyoung]

Although oxygen is more electronegative than nitrogen, nitro group is more electron withdrawing than hydroxyl group, right? Oxidation state also matters when considering inductive effect, since electronegativity changes with oxidation states for an element. It's the same thing that inductive effect follows  F > H > CH3.