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NEET 2013
Exam
NEET
Year
2013
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

NEET 2013 · Chemistry · p Block Elements (Group 13 & 14)

Which of the following is electron deficient?

Which of the following is electron deficient?

Options

  1. A(CH3}2\left(\mathrm{CH}_3\right\}_2
  2. B(SiH3)2\left(\mathrm{SiH}_3\right)_2
  3. C⟨BH3⟩\left\langle\mathrm{BH}_3\right\rangle
  4. DPH3\mathrm{PH}_3

Correct answer

C. ⟨BH3⟩\left\langle\mathrm{BH}_3\right\rangle

Step-by-step solution

Boron is an element of 13 group and contains three electrons in its valence shell. When its compound BH3\mathrm{BH}_3 dimerises, each boron atom carry only 6e−6 e^{-}, that is their octet is incomplete. Hence, (BH3)2\left(\mathrm{BH}_3\right)_2 is an electron deficient compound. In all other given molecules octet of central atom is complete.
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