Question

There are several variations of the Aldol reaction. Which of the following types of reactants leads to only one possible product with the Aldol condensation reaction? a. Two different aldehydes with alpha-hydrogens are able to form a single aldol condensation product. b. Two different ketones with alpha-hydrogens are able to form a single aldol condensation product. c. Any aldehyde and ketone mixed together can react to form a single condensation product. d. Any pair of aldehyde or ketone reactants where one of the reactants has no alpha-hydrogens will lead to a single aldol product. Which of the following is a secondary (2 degree) amine? Although an amine nitrogen atom containing an electron pair and bonded to three different groups is technically a stereogenic center, the chirality of the amine nitrogen is often ignored. Why is that? a. Because four bonds are needed to define a stereogenic center. b. Because chirality only exists with the tetrahedral carbon atoms. c. Because there is usually slow interconversion between the two isomeric forms at room temperature. d. Because there is usually rapid interconversion between the two isomeric forms at room temperature.

Answer 1

A (36) Answer (dCiny pair of aldehyde or ketone reactants where one of the reactants has no -hydrogens will lead to a single aldol product eg (ii) who + fph Naon phir 'In other Q cases (a), (b) and (c) muorterre ols aldol Product are Isormed 15 two distreret aldehyde of two clikboerd in kelome more with a hydrogen are giver mucture ols Four Product ( two sells aldol + two cross aldol 2. Any aldehyde god keterse we can puse, then again busteree ols Product Isormed. eig co ophion (as int in Hoe finthar Hiirryin (37) Seccondary Gracine и (TL) (N atom attached to two alkylgrup) Manny Pamine of the lamine (38) Cd) Because there is usually rapid inter conversion between the two isomeric brooms at room temperature