State the contribution of Nyholm and Gillespi | vedclass

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(N/A) Nyholm and Gillespie $(1957)$ refined the $VSEPR$ model by explaining the important difference between the lone pair and bonding pairs of electr

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(N/A) Nyholm and Gillespie $(1957)$ refined the $VSEPR$ model by explaining the important difference between the lone pair and bonding pairs of electrons.
While the lone pairs are localised on the central atom,each bonded pair is shared between two atoms.
As a result,the lone pair electrons in a molecule occupy more space compared to the bonding pairs of electrons.
This results in greater repulsion between lone pairs of electrons compared to the lone pair-bond pair and bond pair-bond pair repulsions.
These repulsion effects result in deviations from idealised shapes and alterations in bond angles in molecules.

List-$I$	List-$II$
$I$. $XeF_4$	$A$. See-saw
$II$. $I_3^-$	$B$. Tetrahedral
$III$. $XeO_2F_2$	$C$. Bond angle $90^o$
$IV$. $SO_4^{2-}$	$D$. Linear

List-$A$	List-$B$
$(1)$ $AB_3E_2$	$(A)$ $BrF_5$
$(2)$ $AB_2E_2$	$(B)$ $NH_3$
$(3)$ $AB_5E$	$(C)$ $H_2O$
$(4)$ $AB_3E$	$(D)$ $ClF_3$

State the contribution of Nyholm and Gillespie in $VSEPR$ theory.

Similar Questions

Match List-$I$ with List-$II$ and select the correct answer using the codes given below the lists.

List-$I$ List-$II$

$I$. $XeF_4$ $A$. See-saw

$II$. $I_3^-$ $B$. Tetrahedral

$III$. $XeO_2F_2$ $C$. Bond angle $90^o$

$IV$. $SO_4^{2-}$ $D$. Linear

The molecule having the smallest bond angle is:

Maximum bond angle is present in :-

Match the following List-$A$ and List-$B$ correctly.

List-$A$ List-$B$

$(1)$ $AB_3E_2$ $(A)$ $BrF_5$

$(2)$ $AB_2E_2$ $(B)$ $NH_3$

$(3)$ $AB_5E$ $(C)$ $H_2O$

$(4)$ $AB_3E$ $(D)$ $ClF_3$

Which has a larger bond angle between $PH_3$ and $PH_4^+$? Why?

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