Have you registered for the PRE-JEE MAIN PRE-AIPMT 2016? 1 Answer Alfredo T. Feb 12, 2016 O-Si-O angles are perfectly tetrahedral (109.5 °) Explanation: #SiO_2# is not formed of molecules, but is a giant covalent lattice. Explain why the following ions have different bond angles: CLO2- and NO2-. Use the VSEPR or the hybridization method to predict the bond angles in the following molecules. ClO2- has 7+6+6+1=20 total valence electrons to distribute. What is bond angle of SiO2? To calculate the bond angle in ClO2-you would need to write the Lewis structure, then draw the VSEPR model. The compound is composed of a central chlorine atom with two oxygen atoms connected via covalent bonds. This is because of two groups of bonding electrons and two lone pairs of electrons. 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 In doing so, the electron pair geometry of the molecule is tetrahedral and the molecular geometry is bent. It is an oxidizing agent, able to transfer oxygen to a variety of substrates, while gaining one or more electrons via oxidation-reduction (). Chemistry Covalent Bonds VSEPR. Paper by Super 30 Aakash Institute, powered by embibe analysis.Improve your score by 22% minimum while there is still time. Since O atom is larger than Cl atom, that also contributes to the substantially larger bond angle than in Cl2O. Q. Although VSEPR theory does not tell you how much less the bond angles will be, I have found one reference to an xray crystal study that claims a O-Cl-O bond angle of around 106 degrees. Predict the bond angle in each case. The bond angle of a chlorite ion or ClO2- ion is 109.5 and has a bent shape. And don't get me wrong, VSEPR is a great model, but as with Newtons Law - there comes a point where it just doesn't explain what is going on. Both resonance structures have a bent molecular geometry with an O=Cl-O bond angle of 117.6 degrees. Chlorine dioxide is a chemical compound with the formula ClO 2 that exists as yellowish-green gas above 11 °C, a reddish-brown liquid between 11 °C and −59 °C, and as bright orange crystals below −59 °C. ClO2 needs MO, and 3-electron-2-center bonds to make even close to sense, and the woefully inadequate vsepr theory or hybridisation will not be enough. ClO2 has 7 + 6 + 6 = 19 total valence electrons. It results from its tetrahedral electron pair shape. Solved • Aug 29, 2019 Bond Angles Q. Show your reasoning. 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. Another example of a molecule that has a bent molecular geometry is water. This is not intended to mean that the bond angle will be 106 degrees in all cases but it does support the idea of a smaller angle for the O-Cl-O bond in ClO3- compared to ClO4-. Chlorine dioxide has two resonance structures with a double bond on one side and a single bond and three electrons on the other.