Give examples of steric effects, Chemistry

Assignment Help:

Give Examples of steric effects

These are both examples of steric effects. Placing three highly branched groups around a central boron results in van der Waals repulsions. These repulsions are severe enough that only two groups can be bound to boron in the case of disiamylborane, and only one group in the case of thexylborane. (Notice the greater number of alkyl substitutions in the "thexyl" group.) Now, alkyl branches stabilize sp2-hybridized boron (see the solution to Problem 4.48 on p. 62 of the Study Guide and Solutions Manual) just as they stabilize sp2-hybridized carbon; but if the alkyl branches are themselves branched, they form a thicket of methyl groups that interact repulsively with each other as more of these branches are accumulated. These repulsive interactions reduce the relative stability of the trialkylboranes-evidently, so much so that they cannot form.

 


Related Discussions:- Give examples of steric effects

How are mixed ferrites prepared for industrial uses, What are ferrox cubes ...

What are ferrox cubes and ferrites? How are mixed ferrites prepared for industrial uses? Give an account of applications of ferrites pointing out their advantages over a ferromagne

Determine infrared moisture balance in flour, Q. Determine Infrared moistur...

Q. Determine Infrared moisture balance in flour? Infrared moisture balance is an instrument for measuring the moisture content of materials that do not change their chemical

Sodium, what can be formed by sodium reacting with epsum salt

what can be formed by sodium reacting with epsum salt

Test of proteins - nitroprusside test, Test of proteins - Nitroprusside tes...

Test of proteins - Nitroprusside test Nitroprusside test : Proteins consisting of -SH group give this test. While sodium nitroprusside solution is added to proteins comprising

Analytical chemistry, describe the steps involved in a sampling operation o...

describe the steps involved in a sampling operation of a chemical sample

Natural rubber, Natural rubber: Natural rubber is obtained by making small...

Natural rubber: Natural rubber is obtained by making small incisions on the bark of certain types of trees, like "Have a brasiliensis" and "Ganynle". White milky liquid substance

What is the dipole moment of chloro-octane, What is the dipole moment of ch...

What is the dipole moment of chloro-octane? Ans) There are many forms of the molecule "chloro-octane." This is due to the chlorine atom can be attached to the octane chain in va

Explain greater dipole moment, Which of the following two compounds would y...

Which of the following two compounds would you wait for to have a greater dipole moment? Support your reply by writing the corresponding (plausible) resonance structures.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd