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Problem
Problem
Consider the following species: (i)
CH
3
+
\text{CH}_3^+
CH
3
+
(ii)
(
C
3
H
5
)
3
Al
(\text{C}_3\text{H}_5)_3\text{Al}
(
C
3
H
5
)
3
Al
(iii)
HCHO
\text{HCHO}
HCHO
(iv)
CH
4
\text{CH}_4
CH
4
(v)
(
C
2
H
5
)
3
N
(\text{C}_2\text{H}_5)_3\text{N}
(
C
2
H
5
)
3
N
(vi)
TiCl
4
\text{TiCl}_4
TiCl
4
(vii)
CO
2
\text{CO}_2
CO
2
(viii)
SiCl
4
\text{SiCl}_4
SiCl
4
(ix)
BF
3
\text{BF}_3
BF
3
Find out the total number of species which can act as a Lewis acid.
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