lewis acid??

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which of the following statements is correct??

1.BCl₃ nd AlCl₃ are both lewis acid but BCl₃ is stronger
2.BCl₃ nd AlCl₃ are both lewis acid but AlCl₃ is stronger
3.BCl₃ nd AlCl₃ are equally strong lewis acid
4.none of these

#Chemistry #Physical Chemistry

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Subhomoy Bakshi ·2010-04-23 10:58:56

2.?

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smsm ·2010-04-23 11:01:28

sorry , but the ans given is "1". i was also thinking it be "2"

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madhumitha harishankar ·2010-04-23 11:16:44

so 2!

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lubu ·2010-04-23 11:40:24

yes backbonding is not so strong as that of BF₃. It is due 2 d overlap of vacant 2p-orbital with 3p and 4p orbitals doesnt take place effectively due to difference in energy. It may b d reason for BCl₃ to b d more stronger btwn des 2. Not so sure.Just an attempt.

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smsm ·2010-04-23 11:51:21

if we consider
another fact that Al has vacent d orbitals so it can accept more electrons rather than B

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lewis acid??

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