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

Properties of matter, is vinegar has a pungent odor. is it chemical or phys...

is vinegar has a pungent odor. is it chemical or physical property?

Show the colorimetric analysis, Q. Show the Colorimetric analysis? Colo...

Q. Show the Colorimetric analysis? Colorimetric analysis depends on the variation of the colour with the change in concentration of the compound. Usually, absorption of light i

Methane - members of alkanes, Methane - Members of Alkanes It is also t...

Methane - Members of Alkanes It is also termed as marsh gas.   (i) Industrial method of preparation: Mathane gas is acquired on a large scale from natural gas by liquefactio

Compounds containing nitrogen, which compounds will dissolve in alkaline so...

which compounds will dissolve in alkaline solution after it has undergone reaction with hinsberg reagent

Melting points of s block, give the melting temperature values of group 2 e...

give the melting temperature values of group 2 elements

o-methoxy benzoic acid , which is more acidic among o-methoxy benzoic acid...

which is more acidic among o-methoxy benzoic acid and m-methoxy benzoic acid   Ans) O-methoxy benzoic acid is more acidic than m-metoxy benzoic acid.

The number of unpaired electrons in an o2 molecule, The number of unpaired...

The number of unpaired electrons in an O 2   molecule is: (1) 0        (2) 1         (3) 2      (4) 3 Ans: 2

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