
Concept explainers
Interpretation:
Given that the major product formed by intramolecular aldol cyclization of 2, 5-heptanedione has two singlet absorptions in the 1H NMR spectrum at 1.65 δ and 1.90 δ and has no absorptions in the range 3 δ to 10 δ. Its structure is to be given.
Concept introduction:
Looking at the number of signals and the region in which they are observed it is possible to predict the major product.
To give:
The structure of the major product formed by the intramolecular aldol cyclization of 2, 5-heptanedione that has two singlet absorptions in the 1H NMR spectrum at 1.65 δ and 1.90 δ and has no absorptions in the range 3 δ to 10 δ.

Want to see the full answer?
Check out a sample textbook solution
Chapter 23 Solutions
Organic Chemistry - With Access (Custom)
- A. B. b. Now consider the two bicyclic molecules A. and B. Note that A. is a dianion and B. is a neutral molecule. One of these molecules is a highly reactive compound first characterized in frozen noble gas matrices, that self-reacts rapidly at temperatures above liquid nitrogen temperature. The other compound was isolated at room temperature in the early 1960s, and is a stable ligand used in organometallic chemistry. Which molecule is the more stable molecule, and why?arrow_forwardWhere are the chiral centers in this molecule? Also is this compound meso yes or no?arrow_forwardPLEASE HELP! URGENT!arrow_forward
- Where are the chiral centers in this molecule? Also is this compound meso yes or no?arrow_forwardA mixture of C7H12O2, C9H9OCl, biphenyl and acetone was put together in a gas chromatography tube. Please decide from the GC resutls which correspond to the peak for C7,C9 and biphenyl and explain the reasoning based on GC results. Eliminate unnecessary peaks from Gas Chromatography results.arrow_forwardIs the molecule chiral, meso, or achiral? CI .CH3 H₂C CIarrow_forward
- A mixture of three compounds Phen-A, Acet-B and Rin-C was analyzed using TLC with 1:9 ethanol: hexane as the mobile phase. The TLC plate showed three spots of R, 0.1 and 0.2 and 0.3. Which of the three compounds (Phen-A; Acet-B or Rin-C) would have the highest (Blank 1), middle (Blank 2) and lowest (Blank 3) spot respectively? 0 CH: 0 CH, 0 H.C OH H.CN OH Acet-B Rin-C phen-A A A <arrow_forwardHow many chiral carbons are in the molecule? Farrow_forwardcan someone give the curly arrow mechanism for this reaction written with every intermediate and all the side products pleasearrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningOrganic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning


