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Q.

Which one of the following is not an electron deficient compound

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a

$B_{2} H_{6}$

b

${Al}_{2} {CI}_{6}$

c

${AICI}_{3}$

d

${BCI}_{3}$

answer is D.

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Detailed Solution

Electron deficient compounds are those for which the octet is incomplete. In BCl₃, Boron has only 6 electrons in outermost shell. Similarly, in AlCl₃, Al has only 6 electrons in the outermost shell. Al₂Cl₆ is not an electron deficient compound since it has a coordinate bond among Al and Cl atoms between one AlCl₃ molecule and the other, In B₂H₆also, boron has only 6 electrons in the outermost shell.

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