Which one of the following methyl diboranes d | vedclass

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(D) Diborane $(B_2H_6)$ can undergo substitution reactions with methyl groups to form various methyl diboranes.The known methyl diboranes are: monomet

Vedclass · Accepted Answer

$B_2H(CH_3)_5$

Vedclass · Answer

(D) Diborane $(B_2H_6)$ can undergo substitution reactions with methyl groups to form various methyl diboranes.The known methyl diboranes are: monomethyl diborane $(B_2H_5(CH_3))$,dimethyl diborane $(B_2H_4(CH_3)_2)$,trimethyl diborane $(B_2H_3(CH_3)_3)$,and tetramethyl diborane $(B_2H_2(CH_3)_4)$.The compound $B_2H(CH_3)_5$ (pentamethyl diborane) does not exist because it would require the substitution of a bridging hydrogen atom,which is not possible under standard conditions.Therefore,option $D$ is the correct answer.

Column $-A$	Column $-B$
$(1)$. $VH$	$(a)$. Ionic hydride
$(2)$. $HF$	$(b)$. Metallic hydride
$(3)$. $MgH_2$	$(c)$. Electron precise hydride
$(4)$. $B_2H_6$	$(d)$. Molecular hydride

Which one of the following methyl diboranes does not exist?

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Match the correct option from Column $-A$ and Column $-B$.

Column $-A$ Column $-B$

$(1)$. $VH$ $(a)$. Ionic hydride

$(2)$. $HF$ $(b)$. Metallic hydride

$(3)$. $MgH_2$ $(c)$. Electron precise hydride

$(4)$. $B_2H_6$ $(d)$. Molecular hydride

$TiH_{1.73}$ is an example of

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