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It is a Lewis base:

PCl3 has a lone electron pair in the highest occupied molecular orbital available for donation.

( Note: PCl5 is a Lewis acid!)

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Wiki User

13y ago
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12y ago

Phosphorous trichloride can react as a Lewis base:

PCl3 reacts rapidly and exothermically with water to form phosphorous acid, H3PO3 and HCl: PCl3 + 3 H2O → H3PO3 + 3 HCl

Phosphorus trichloride has a lone pair, and therefore can act as a Lewis base.

For example with the Lewis acids BBr3 it forms a 1:1 adduct, Br3B−−+PCl3.

Metal complexes such as Ni(PCl3)4 are also known.

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10y ago

coz PCl3 has one lone pair of electrons but PCl5 hasnt any but vacant d-orbital thus behaves as lewis acid

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13y ago

BCl3 is a strong Lewis acid.

BCl3 + 3 H2O --> B(OH) + 3 HCl
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12y ago

ZnCl2 is a lewis acid

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Manish Nayek

Lvl 2
1y ago

base

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Q: Why pcl3 is a Lewis base and pcl5 is a Lewis acid?
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