Question

13. Assuming that molecular weights are comparable, which of the following compounds would you expect to be the highest boiling? a. aldehyde b. alkene c. ketone dd. alcohol 14. Predict the resultant compound class when an aldehyde is oxidized ? a. hemiketal b. alcohol cc. carboxylic acid d. no reaction 15. Hemiacetals are? a. produced on the oxidation of a carboxylic acid b. result of the reaction between an aldehyde and a ketone cc.composed from Ether and OH group d. are produced when an ether reacts with a ketone 16. To what class of compounds does glucose belong? a. cyclic ketone b. cyclic aldehyde cc. cyclic hemiacetal d. acid 18. What is the major difference between a cyclic hemiacetal and a cyclic acetal?Bottom of Form 18. What is the major difference between a cyclic hemiacetal and a cyclic acetal?Bottom of Form 18. What is the major difference between a cyclic hemiacetal and a cyclic acetal? Bottom of Form 18. What is the major difference between a cyclic hemiacetal and a cyclic acetal? Bottom of Form d- Hydration c-Grignard alkylation reaction 20. The product of the following reaction is keye b-hemiacetal d- ketones aa- an acetal d-aldhyde

Answer 1

The answers to the questions with explanations are provided below.

Any 13 2 Alconal te Assuming comparable molecular weights, alcobas has highest boiling point among all four com as alcohol has -OH Geraup & hence has hydrogen bonding which are very strong and needs high energy to break. O Carbonylic Acid pre 14 Unlike ketones, aldehyees and the product , in Carbonylic Acid fummation can be acidic easily ouidize condition ů a * 15 ( compased from Ether & OH graup Ethers have structure i p o & The structure of hemi acetal is: R R hemiacetal 16) Si cycle „CH₂OH Ether group OH J oh group OH B. D Glucopyranese 애 OH

P as 17 & Cour Not provided Anys) Acetal is a (compound which contains 2 ether groups on same carbon and has the structure as follows. Ro , OR A lyclic at least acetal is one in which one Orygen is the acetal part of the Carbon & bring structure ON o acetal Carbon OCH2 Hemiacetal, on the otherhand has one ether group & one -OH group attached to a courbon autom. Cyclic Hemiacetul has once hemiacetul combon & one of the onygen atoms as a part of the ring as the following structure: - hemiacetal Carbon In the cyclic stencture we Cyclic hemicacital has acetal observe –OH structure & cyclic hemiacetas the mejas difference is that group & cyclic acetal has -OR. 3201 of The product As the Carbon hence it is an the reaction is a atom has two ether acetal graup. an group acetal a attached -