Which of the following pairs of compounds is isoelectronic and isostru

1.	Which of the following pairs of compounds is isoelectronic and isostructural ?
Answer» `BeCl_(2) , XeF_(2)` `Tel_(2), XeF_(2)` `Ibr_(2)^(-) , XeF_(2)` `IF_(3), XeF_(2)` Solution :`IBr_(2)^(-) = 7 + 7 xx+ 2 + 1 =22` electrons `XeF_(2) = 8 + 7 xx2 = 22 ` electrons Therefore, both the species are isoelectronic. In both the species, the central atoms UNDERGO `sp^(3)` d-hybriduzation giving trigonal bipyramidal geometry where three EQUATORIAL position are occupied by lone pairs of electrons giving a linear shape to `IB_(2)^(-) and XeF_(2)` as shown in the structures below : Thus , these two species are ALSO isostructural.

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