For carbon hydrides which belong to type (Cn H2n+2), the following hydrides are possible for
n = 1⇒CH4
n = 2⇒C2 H6
n = 3⇒C3 H8
For a hydride to act as a Lewis acid, it should be electron deficient.
Lewis acid = electron accepting
Also, for a hydride to act as a Lewis base, it should be electron rich.
Lewis base = electron donating
Taking C2 H6 as an example, the total number of electrons are 14 and the total covalent bonds are 7. Hence, the bonds are regular 2e– 2centered bonds.
Hence, hydride C2 H6 has sufficient electrons to be represented by a conventional Lewis structure. Therefore, it is an electron-precise hydride, having all atoms with octets. Thus, it can neither accept nor donate electrons to act as a Lewis base or Lewis acid.Answered by Pragya Singh | 1 year ago
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