Consider the following species CF4, GeH4, BCl3, AlBr3, H2O, PH3, PCl5, CO2, CH4 and calculate value of (x - y)^2 :
Where, x: Total number of species which can act as only Lewis acid.
y: Total nu

Question

Consider the following species CF4, GeH4, BCl3, AlBr3, H2O, PH3, PCl5, CO2, CH4 and calculate value of (x - y)^2 :
Where, x: Total number of species which can act as only Lewis acid.
y: Total number of species which can act as Lewis acid as well as Lewis base.

Prashant Kotian · Accepted Answer

Correct answer: 16 / X = 5 (GEH4, BCL3, ALBR3, PCL5, CO2 ACT ONLY AS LEWIS ACID). Y = 1 (PH3 ACTS AS LEWIS ACID AS WELL AS BASE DUE TO EMPTY D-ORBITALS AND LONE PAIR). (5 - 1)^2 = 16. Step 1: In trisilylamine, (SiH3)3N, the nitrogen atom has a lone pair of electrons, and each silicon atom has vacant 3d-orbitals. Step 2: Nitrogen donates its lone pair into the vacant 3d-orbitals of silicon via pπ-dπ back-bonding, which causes the hybridization of nitrogen to become sp2 (trigonal planar) and reduces the availability of the lone pair. Step 3: As a result, the molecule is trigonal planar and only weakly basic, corresponding to option (d).

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