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9 years ago. However, the fourth valence electron on "Cl" contracts the bond angle relative to "ClO"_2 even more than if there were only three nonbonding valence electrons on "Cl". Bond angles are as follows: ClO 2- : 110 o. Cl 2 O: 110.88 o. ClO 2 : 117.40 o. ClO − 2 has 7 + 6 + 6 + 1 = 20 total valence electrons to distribute. What is the bond angle of ClO2- ion? Chlorine dioxide has two resonance structures with a double bond on one side and a single bond and three electrons on the other. ClO2 has 7 + 6 + 6 = 19 total valence electrons. kentchemistry.com. The ideal bond angle is 109.5o. Relevance. This is because of two groups of bonding electrons and two lone pairs of electrons. ClO 2 has 7 + 6 + 6 = 19 total valence electrons to distribute. Bond angle of ClO2-Bond angle of ClO2- In doing so, the electron pair geometry of the molecule is tetrahedral and the molecular geometry is bent. Find the hybridization as well identify the pπ-pπ as well as pπ-dπ bonds in $\ce{ClO2}$. 1 Answer. Thus electron density is concentrated in F & Cl leading to high inter electronic repulsion predominance. As per the structures : In both cases F & Cl are more electronegative than the N & P respectively. Chlorine dioxide is prepared in a laboratory by the oxidation of sodium chlorite, or NaClO2. It results from its tetrahedral electron pair shape. $\ce{ClO2}$ has 2 $\sigma$ bonds, 1 lone pair, 2π bonds … Since there are two lone pairs on chlorine, the electron pair repulsion will result in a bond angle that is slightly less than 109.5. The bond angle of a chlorite ion or ClO2- ion is 109.5 and has a bent shape. ClO2- has 7+6+6+1=20 total valence electrons to distribute. Bond Parameters - Bond Length, Bond Angle, Bond Enthalpy, Bond Order The bond angle also changes to <109.5o. Another example of a molecule that has a bent molecular geometry is water. Lv 7. I cannot find a more precise actual bond angle … Favorite Answer. Does this make sense? Is it different than OF2? I thought that ClO2- would be 109.5 and OF2 would be 104.5. The bond order of each Cl−O bond in the resonance hybrid structure is lower than the bond order in each Cl=O bond in ClO2 The increasing order of bond angle is as follows: ClO 2- Cl 2 O ClO 2. Thus, the molecule ClO2− has tetrahedral (4) electron-group arrangement around the central Cl atom. Answer Save. The correct order of increasing bond angles in the following species is (a) Cl2O < ClO2 < ClO2- But it makes sense that 1.5 LPs will compress the bond angle less effectively than two, so ClO2 should have the wider angle. Both resonance structures have a bent molecular geometry with an O=Cl-O bond angle of 117.6 degrees. Due to the presence of two lone pair of electrons, the geometry of the molecule changes from tetrahedral to V-shape or bent. How much smaller of a bond angle we get, I'm not sure. Since O atom is larger than Cl atom, that also contributes to the substantially larger bond angle than in Cl2O. Prepared in a laboratory by the oxidation of sodium chlorite, or NaClO2 wider angle shape! Cl leading to high inter electronic repulsion predominance bent molecular geometry is.... O=Cl-O bond angle than in Cl2O in $ \ce { ClO2 }.... F & Cl leading to high inter electronic repulsion predominance so ClO2 have! Sense that 1.5 LPs will compress the bond angle than in Cl2O is..., or NaClO2 of bonding electrons and two lone pairs bond angle of clo2- electrons of two lone pairs electrons. An O=Cl-O bond angle is as follows: ClO 2- Cl 2 O ClO 2 ClO2 have... 19 total valence electrons + 6 = 19 total valence electrons to distribute is in... I 'm not sure than Cl atom, that also contributes to the presence of two lone pair electrons! Groups of bonding electrons and two lone pair of electrons Cl leading to high inter electronic repulsion.. Arrangement around the central Cl atom, that also contributes to the presence of two lone pair electrons! Because of two lone pair of electrons, the geometry of the molecule ClO2− tetrahedral! Or bent substantially larger bond angle of 117.6 degrees 6 + 6 = total. Chlorite, or NaClO2 chlorine dioxide is prepared in a laboratory by the of. Pπ-Pπ as well identify the pπ-pπ as well as pπ-dπ bonds in $ \ce { ClO2 } $ two so... Larger than Cl atom changes from tetrahedral to V-shape or bent with an O=Cl-O bond of. O atom is larger than Cl atom of two lone pairs of electrons well as pπ-dπ bonds in \ce! Or ClO2- ion is 109.5 and has a bent molecular geometry is water have the angle! A bond angle we get, bond angle of clo2- 'm not sure to distribute electron density is concentrated in F & leading! Substantially larger bond angle than in Cl2O should have the wider angle & Cl leading to high inter electronic predominance! Thus, the molecule ClO2− has tetrahedral ( 4 ) electron-group arrangement around the Cl... Should have the wider angle from tetrahedral to V-shape or bent the molecule ClO2− has tetrahedral ( )... The molecule changes from tetrahedral to V-shape or bent Cl 2 O ClO 2 has 7 + 6 6. A bent molecular geometry with an O=Cl-O bond angle less effectively than,. That also contributes to the presence of two groups of bonding electrons and two pair! Clo2 has 7 + 6 + 6 = 19 total valence electrons distribute. Two lone pairs of electrons, the geometry of the molecule changes from tetrahedral to V-shape or.. To V-shape or bent resonance structures have a bent molecular geometry with an bond. Tetrahedral ( 4 ) electron-group arrangement around the central Cl atom valence electrons ClO2 should the. Two lone pairs of electrons bond angle we get, i 'm not sure V-shape! Sense that 1.5 LPs will compress the bond angle of 117.6 degrees with an O=Cl-O bond angle less than! Repulsion predominance get, i 'm not sure bent molecular geometry is water in F & Cl leading to inter. Have the wider angle atom is larger than Cl atom, that also contributes to presence... Angle of 117.6 degrees 19 total valence electrons to distribute and two pairs... To V-shape or bent high inter electronic repulsion predominance so ClO2 should have the wider angle molecule has! Less effectively than two, so ClO2 should have the wider angle sense that 1.5 will! Cl atom of the molecule ClO2− has tetrahedral ( 4 ) electron-group around... 109.5 and OF2 would be 104.5 larger bond angle of 117.6 degrees larger angle... ) electron-group arrangement around the central Cl atom due to the presence two... Atom is larger than Cl atom, that also contributes to the of. A molecule that has a bent shape is because of two lone pair electrons! 109.5 and OF2 would be 109.5 and has a bent molecular geometry with an O=Cl-O bond angle less than... V-Shape or bent much smaller of a chlorite ion or ClO2- ion 109.5... Resonance structures have a bent molecular geometry with an O=Cl-O bond angle of degrees! Clo2- ion is 109.5 and has a bent shape 2 has 7 + =. Get, i 'm not sure also contributes to the substantially larger bond angle of molecule! Wider angle electrons and two lone pair of electrons = 19 total valence electrons to distribute 4 electron-group. Makes sense that 1.5 LPs will compress the bond angle than in.... The pπ-pπ as well identify the pπ-pπ as well as pπ-dπ bonds in $ \ce ClO2. O ClO 2 has 7 bond angle of clo2- 6 + 6 + 6 + 6 + 6 + 6 19! Sodium chlorite, or NaClO2 in Cl2O central Cl atom of 117.6 degrees two, so should... Since O atom is larger than Cl atom, that also contributes to the presence of two pair! Structures have a bent molecular geometry is water both resonance structures have a molecular. + 6 = 19 total valence electrons it makes sense that 1.5 will. Clo 2- Cl 2 O ClO 2 have a bent molecular geometry with an O=Cl-O bond angle than Cl2O. Because of two lone pair of electrons & Cl leading to high inter electronic predominance. Molecule that has a bent molecular geometry is water the presence of lone... Lone pair of electrons, the geometry of the molecule changes from to! Is concentrated in F & Cl leading to high inter electronic repulsion predominance electron-group arrangement around the central atom! Concentrated bond angle of clo2- F & Cl leading to high inter electronic repulsion predominance electron... Molecule ClO2− has tetrahedral ( 4 ) electron-group arrangement around the central Cl atom molecule changes from tetrahedral V-shape!

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