Lewis acid

[unreal flare]

How to judge between BX3 And ALX3 type?

[clear shard]

<@&1227988359910260737>

Note for OP

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[unreal flare]

Im able to judge bw BX3 by back bonding strength

[unreal flare]

anyone?

[vital flume]

Boron me 2p orbital se back bonding hota hai

Aluminium se 3p se

To boron is more wanting towards electron

And vaise bhi boron ki electronegativity jyda hai

Hence loves electrons

[valid turtle]

lewis acid strength goes like BI3 > BBr3 > BCl3 > BF3
now this is because of p pi p pi back bonding between p orbital of B and of the halogen. BI3 has worst back bonding because of the large P orbital

thus the most acidic nature ( more probable to accept electrons )

now wouldnt Al and B follow the same logic

Al has 3p whereas as B has 2p
3p is bigger than 2p

[unreal flare]

Back bonding depends on size factor no? Bada size= less bb?

[valid turtle]

yes exactly

[unreal flare]

Bb zyda to ganda lewis acid because usme deficiency utna nhi hai electron ka right?

[valid turtle]

sorry ?

[unreal flare]

Back bonding jisme strong hoga wo weak lewis acid right?

[valid turtle]

yeah

thats what i said

BI3 mein weak back bonding hai cuz boron ke p orbital and I ke p orbital mei bohot bada size diff hai

similarly

ohh shit

Cl and Al ka p toh same size hai

and B ka chota hai

yeah makes more sense

[sly narwhal]

+solved @valid turtle