Polyatomics, Chemistry

Assignment Help:

 

Three-center bonding

 Example of where the 2c bonding picture is not present is in diborane B2H6. The terminal B-H bonds can be defined in simple 2c terms, but the number of electrons available advised that each bridging hydrogen forms part of a 3c bond involving the two boron atoms. The MO method gives a simple interpretation. Four H atoms are disposed roughly tetrahedrally around each boron; this arrangement gives that sp3 hybrids are used. Two such hybrids form normal 2c bonds by overlap with the 1s AO on the terminal hydrogen's. The others are correlated as in 1 to form two 3c bridge bonds. In addition to B-H overlap there is some direct overlap between the boron hybrids, which gives some B-B bonding as well. The result is named as a three center two-electron (3c2e) bond. 3c2e bonds with bridging hydrogen occur in other circumstances, as like the normal form of BeH2, which has a polymeric chain structure with all H atoms in bridging positions.

Other groups such as methyl CH3 can do this, as in diametric aluminum methyl, Al2(CH3)6, which has a structure essentially same as B2H6 with CH3 in place of H.

 

 

1948_Untitled.png

 

 

281_Untitled.png

 

 

1415_Untitled.png


Related Discussions:- Polyatomics

Explain reactions collision theory and its postulates., Through, Arrhenius ...

Through, Arrhenius equation is applicable under a wide range of circumstances but collision theory, which was developed by Max Trautz and William Lewis in 1916-18, provides a great

Thermodynamic equilibrium constant, Q. For a homogeneous reaction in which ...

Q. For a homogeneous reaction in which the reactants and products are solutes in a solution, write a rigorous relation between the standard molar reaction enthalpy and the temperat

Law of inverse proportion., I want to know about law of inverse proportion ...

I want to know about law of inverse proportion clearly.

Intrinsic semiconductor become an extrinsic semiconductor, When does intrin...

When does intrinsic semiconductor become an extrinsic semiconductor? Illustrate. Semiconductor doping is the process which changes an intrinsic semiconductor to an extrinsic se

Protein determination, Protein determination In experimental chemistry,...

Protein determination In experimental chemistry, biochemistry, biology and biotechnology, it is often vital to know the amount of protein present in a solution. For instance yo

Why vitamine c is not stored in our body ?, There are two type of vitamine...

There are two type of vitamines 1.water soluble 2.fat soluble water soluble vitamines are B complex and C vitamines vitamine c is soluble in water so dissolve in water and ca

Determine the conversion of eo for a cstr, Close to 12.2 billion metric ton...

Close to 12.2 billion metric tons of ethylene glycol (EG) were produced in 2000, which ranked it the twenty-sixth most produced chemical in the nation that year on a total mass bas

What are hybrid propellants, State the function along with one example each...

State the function along with one example each of: (i) Antihistamines (ii) Antioxidants   (b) What are hybrid propellants?

MOLALITY, Ask question the density of 2 molal aqueous solution of NaOH is 1...

Ask question the density of 2 molal aqueous solution of NaOH is 1.1.gram/litre. Calculate the molality of solution?

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