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Which of the following is (are) the correct order of bond lengths : (1) C – C > C = C > C = C > C = N (2) C = N > C = O > C = C (3) C = C > C = N > C = O (4) C – C > C = C > C = C > C – H Which of the following is (are) the correct order of bond lengths : (1) C – C > C = C > C = C > C = N (2) C = N > C = O > C = C (3) C = C > C = N > C = O (4) C – C > C = C > C = C > C – H
Dear Rahul, When we consider a bond between two atoms, the type of bond gives a relative measure of the bond length.Triple Bond Strongest, 3 electron pairs shared, shortest bondDouble Bond Middle, 2 electron pairs sharedSingle Bond Weakest, 1 electron pair shared, longest bondWe need to determine the bond types for each molecule or ion:CO, When drawing the lewis structure here, we end up with a triple bond between the carbon and the oxygen (and a -1 charge on the C and a +1 charge on the O)CO2 This lewis structure gives one double bond between each oxygen and the carbon.[CO3]2- This one is a little trickier, but when we draw the lewis structure for this ion, we get a double bond between one oxygen and the carbon, with single bonds between the other two oxygen atoms and the carbon. Because each of the oxygens want a double bond to the carbon, they all fight over it (giving resonance structures), meaning that in the end, you get a bond something between a double and a single bond for each Carbon-Oxygen bond. Therefore, this bond will be longer than a single bond, but shorter than a double bond:So, this give the following increasing order of bond length:[CO3]2-, CO2, CO Cracking IIT just got more exciting,It s not just all about getting assistance from IITians, alongside Target Achievement and Rewards play an important role. ASKIITIANS has it all for you, wherein you get assistance only from IITians for your preparation and win by answering queries in the discussion forums. Reward points 5 + 15 for all those who upload their pic and download the ASKIITIANS Toolbar, just a simple to download the toolbar…. So start the brain storming…. become a leader with Elite Expert League ASKIITIANS Thanks Aman Bansal Askiitian Expert
Dear Rahul,
When we consider a bond between two atoms, the type of bond gives a relative measure of the bond length.Triple Bond Strongest, 3 electron pairs shared, shortest bondDouble Bond Middle, 2 electron pairs sharedSingle Bond Weakest, 1 electron pair shared, longest bondWe need to determine the bond types for each molecule or ion:CO, When drawing the lewis structure here, we end up with a triple bond between the carbon and the oxygen (and a -1 charge on the C and a +1 charge on the O)CO2 This lewis structure gives one double bond between each oxygen and the carbon.[CO3]2- This one is a little trickier, but when we draw the lewis structure for this ion, we get a double bond between one oxygen and the carbon, with single bonds between the other two oxygen atoms and the carbon. Because each of the oxygens want a double bond to the carbon, they all fight over it (giving resonance structures), meaning that in the end, you get a bond something between a double and a single bond for each Carbon-Oxygen bond. Therefore, this bond will be longer than a single bond, but shorter than a double bond:So, this give the following increasing order of bond length:[CO3]2-, CO2, CO
Cracking IIT just got more exciting,It s not just all about getting assistance from IITians, alongside Target Achievement and Rewards play an important role. ASKIITIANS has it all for you, wherein you get assistance only from IITians for your preparation and win by answering queries in the discussion forums. Reward points 5 + 15 for all those who upload their pic and download the ASKIITIANS Toolbar, just a simple to download the toolbar….
So start the brain storming…. become a leader with Elite Expert League ASKIITIANS
Thanks
Aman Bansal
Askiitian Expert
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