Question

17 Question (1point) Select the true statements from the following list as they relate to experimentally determining reaction mechanisms. 1st attempt See Periodic Table See Hint Select all the correct statements; there is more than one. Choose one or more: Evidence of intermediates sometimes can be seen using techniques such as nuclear magnetic resonance spectroscopy. Carbocations can be routinely isolated (separated from a reaction mixture) and analyzed. Most intermediates are not typically isolated to determine reaction mechanisms. Carbocations are very reactive and are typically not isolated for analysis. Scientists can prove that a specific mechanism exists. Experiments to determine mechanisms involve looking at indirect evidence to help support or disprove a proposed mechanism. Transition states can be isolated and characterized to determine reaction mechanisms.

Answer 1

Q. Select all the correct statements; J Evidences of intermediates sometimes can be Seen using techniques such as nuclear magnetic gesonance spectroscopy. = explanation :- The given statement is correct. I we can analyze the intermediate cnot all) using NMR spectroscopy. he many organic compound is made up of corrbon and Hydrogen, so the IH and 3 C NMR spectroscopy is used for detection Mil in carbocation. the carbon with positive change is highly deshielded and appealis at very high chemical shift Value . Similarly in carbonion, the carbon ceith negative change is highly shielded and appears dit very low -ve) chemical Shift Values 2j caobocations can be routinely isolated (Separates from a geaction mixture) and analyzed. => Explation ; The Given Statement is Waong is the carbocation is electron deficient intermediate coith positive charge on carbon, 9 t is very Reactive ( unstable) and can React with any available nucleophiles of undergoes Reard ange. -Ment: 31 Most intermediates are not typically isolated to determine deaction mechanisms. → Explanation:- The above statement is correct All the intermediates formed are very unstable bence Very Reactive and can undergoes Reaction with any available soto Reagent correspond to iotermediate) hence cannot be isolated

41 carbocations are very geelctive and are typically not isolated for analysis -> Explanation:- The given statement is correct (AS explained in statement ©). s] Scientists can prove that a specific mechanism exists. => Explanation :- The given statement is consect. As we cannot see the reaction that takeplace between Various geaclant with ourne vous factant coith our naked eyes. Cele scientists can prove the mechanism by various techniques such as Nuclear magnetic zesonance Spectroscopy, IR spectroscopy etc 61 Experiments to determine mechanisms involve looking at indirect evidence to help support or dis proye a proposed mechanism > Explanation - The given statement is wong. The mechanism Of Reaction cannobbe proved Og disproved without the help of any direct evidence 71 Transitron States can be isolated and characteria zed to determine deaction mechanisms → Explanations. The above statement is woong - The Tos of any sean is the highest I point in the reaction coordinabe this is a balance point between Starting material and product. Rean coordinate it does not have a lifetime and ... so it cannot be isolated and studied directly. I so the correct state...,976 (1), 631,14115)