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

S block elements, how does solvation of alkali ions occur

how does solvation of alkali ions occur

Elements of group 13, Elements of Group 13 are namely, boron, aluminium, ga...

Elements of Group 13 are namely, boron, aluminium, gallium, indium and, thallium. While studying the alkali and alkaline earth metals, you have seen that all the elements of these

Write electron configuration for a neutral atom of silicon, Q. Write electr...

Q. Write electron configuration for a neutral atom of silicon? Writing Electron Configurations by means of Noble-Gas Notation Use noble-gas notation to write the electron confi

Objectives of coordination compounds, Q. Objectives of  coordination compo...

Q. Objectives of  coordination compounds? Define the terms coordination compounds, coordination number. ligand and oxidation state, Describe IUPAC rules for naming coor

Alkile, Synethesis of alkanesa

Synethesis of alkanesa

Draw the line-bond structure of the nucleotide 2, Draw the line-bond struct...

Draw the line-bond structure of the nucleotide 2'-deoxyadenosine 5'-monophosphate (damp, disodium salt) and of the bases cytosine, guanine, and thymine. Indicate the correct hy

Organic chemistry, preparation of succinic and oxalic acid

preparation of succinic and oxalic acid

Calculation of the power generated by a wind turbine, Calculation of the po...

Calculation of the power generated by a wind turbine: A wind turbine power curve is represented in a simplified manner by: C p is the conversion rate of the turbine:

The nature of bonding in graphite, The nature of bonding in graphite is: ...

The nature of bonding in graphite is: (1) Covalent                                       (2) Ionic     (3) Metallic (4) Coordinate Ans: Covalent

Qualitative analysis, why do we add HCl in common ion effect of II froup

why do we add HCl in common ion effect of II froup

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