Icl3

from wiki..........i dont ahave anything else
""It is bright yellow and in the solid state is present as a planar dimer I₂Cl₆, Cl₂I(μ-Cl)₂ICl₂, with two bridging Cl atoms""[1]

3PCl5 in solid state xists as [PCl5]+[PCl6]-

how does ICl3 Exit in solid form as...????

kamal bhai jahan yak bujhe pata hai
PCl₅exist as [PCl₄]⁺and [PCl₆]^-

if ur ques is [PCl₄]⁺ then
dekh yaar tere pass P hai jo ki N ke nicche atta hai
d d repulsion hogi metallic bonding bhi

but I is a halides and is combining with the halide to give us ICl₃
lone pair repulsion goni chayiye
lp lp is more stronger iss mein covalent bonding hoti hai aur iska structure to tere ko aata hai
thats is the only possible reason 4 which i could think the answer

[I]⁺[ICl₆]^-

i agree wid vishal if it at all exists!