ICl4-, XeF4 and I3 - all are planar molecule/ ion. Explain

Dear Student,

ICl4-, XeF4 has sp3d2 hybridisation and should have octahedral shape, but due to the presence two of lone pair, there occurs lone pair-lone pair repulsion which distorts its shape to square planar. Therefore. ICl4- and XeF4 are square planar in shape. 
I3- has sp3d hybridisation and should have triagonal bipyramidal geometry, but has 3 lone pairs and so there also occurs ‚Äčlone pair-lone pair repulsion which distorts is shape to linear geometry. 
Hence. all the three are planar due to the repulsion of lone pairs. 

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