Concept explainers
Draw structures for the three
Interpretation: The three alkynes having molecular formula C5H8 is to be drawn and each is to be classified as an internal or terminal alkyne.
Concept Introduction: Alkynes are an unsaturated hydrocarbon having at least one carbon-carbon triple bond. The general formula of alkynes are CnH2n-2. The simplest hydrocarbon of alkyne family is acetylene having two carbon atom. Alkynes can be divided into the following two categories based on the position of triple bond; 1) internal alkyne 2) terminal alkyne. In internal alkynes there are no hydrogen atoms bonded to triply bonded carbon atoms. In terminal alkynes there is at least one hydrogen atom bonded to a triply bonded carbon atom.
Answer to Problem 11.1P
the internal and terminal alkynes of molecular formula C5H8 are as follows;
Explanation of Solution
In pent-1-yne and 3-methyl but-1-yne the triple bond is at the terminal side of carbon having one -C-H group. Thus, they are called as terminal alkynes. In case of pent-2-yne the triple bond is in the middle of carbon having no free -C-H group. Thus, it is called as internal alkyne.
Thus, the alkynes of formula C5H is drawn and named as an internal alkyne or terminal alkyne.
Want to see more full solutions like this?
Chapter 11 Solutions
Organic Chemistry
- Compounds X and Y have the formula C6H12- Both X and Y react with one molar equivalent of hydrogen in the presence of a palladium catalyst to form 2-methylpentane. The heat of hydrogenation of X is less than that of Y. X and Y react with HBr to form a mixture of the same bromoalkanes, and they both undergo hydroboration/oxidation to give a mixture of the same alcohols. What is the structure of Y? In cases where there is more than one answer, just draw one. n. n [ ]# ChemDoodleⓇ zaarrow_forwardCompounds A and B are isomers of the molecular formula C9H19Br. Both yield the same alkene C in an elimination reaction. Hydrogenation of C yields the product 2,3,3,4 tetramethyl pentane. What are the structures of A, B, and C?arrow_forward5B In the following reactions, mixtures of alkenes and ethyl ethers are formed. Draw their structures. Explain which is or are likely to be the main product(s) in each reaction. In case of formation of two isomers of alkenes, explain which is formed in greater proportion CH3 CH3 H3C-C H -Br CH3 EtOHarrow_forward
- Write structural formulas for all ketones with the molecular formula C6H12O and give each its IUPAC name. Which of these ketones are chiral?arrow_forwarddraw structural formulas for all isomeric alkanes with molecular formula C7H16. Predict which isomer has the lowest boiling point and which has the highest boiling point.arrow_forwardPlease draw and name all the alkynes of molecular formula C6H10arrow_forward
- There are 18 isomeric alkanes of molecular formula C8H18. Draw and name any eight of them.arrow_forwardA hydrocarbon C5H12 gives only one mono-chlorination product. Identify the hydrocarbon.arrow_forwardDisregarding stereoisomers, draw the structures of all alkenes with molecular formula C5H10. Which ones can exist as cis–trans isomers?arrow_forward
- Draw the structure of an alkane with molecular formula C7H16 that contains (a) one 4° carbon; (b) only 1° and 2° carbons; (c) 1°, 2°, and 3° hydrogens.arrow_forwardDisiamylborane adds only once to alkynes by virtue of its two bulky secondary isoamylgroups. Disiamylborane is prepared by the reaction of BH3 # THF with an alkene.(a) Draw the structural formulas of the reagents and the products in the preparation ofdisiamylboranearrow_forwardThe carbons in an alkane are all hybridised A/ 신arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY