1. Tardigrade
  2. Question
  3. Chemistry
  4. Which of the following elements does not exist in aqueous medium, as species like tetrahedral [M( OH )4]-and octahedral [M( H 2 O )6]3+ ?

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Q. Which of the following elements does not exist in aqueous medium, as species like tetrahedral $\left[M( OH )_{4}\right]^{-}$and octahedral $\left[M\left( H _{2} O \right)_{6}\right]^{3+}$ ?

The p-Block Elements

Solution:

Species like tetrahedral $\left[M( OH )_{4}\right]^{-}$and octahedral $\left[M\left( H _{2} O \right)_{6}\right]^{3+}$ does not exist in case of boron due to non-availability of $d$ orbitals for expanding its covalency.