lewis bases

1. INORGANICCHEMISTRY
(PAPERTWO)
BY
SHARMEEN KHAN

2. CLASSIFICATION OF LEWIS BASES BASED
ON FRONTIER MOLECULAR ORBITAL
TOPOLOGY

3.  WHAT ARE LEWIS ACID ?
 WHAT ARE LEWIS BASES ?
 CLASSIFICATIONOF LEWIS BASES BASED
ON FRONTIER MOLECULAR ORBITAL
TOPOLOGY
 CONCLUSION
 REFERENCES

4.  ACID –CHEMICAL SUBSTANCETHAN CAN
ACCEPT A PAIR OF ELECTRONSTO FORM A
COVALENT BOND.
 BASE- CHEMICAL SUBSTANCETHAT CAN
DONATEA PAIR OF ELECTRONSTO FORM A
COVALENT BOND.

6. 1) s-HOMO LEWIS BASES
2) COMPLEX ANION LEWIS BASES
3) LOBE-HOMO LEWIS BASES
4) PI- HOMO LEWIS BASES

7. 1) s-HOMO LEWIS BASES HAVE SPHERICAL 1s
OR 1s HOMOSWHICH ARE DEVOID OFTHE
CLOSED ELECTRON SHELLSWHICH
HINDER COMPLEXATION
2) THEY HAVE NEGATIVE OR NEUTRAL
CHARGE
3) s-HOMO LEWIS BASES ARE REDUCING
AGENTS
4) H⁻,H₂,etc.

8. 1) COMPLEX ANION LEWIS BASES HAVEA
HYPERVALENT CENTRAL CATION
SATURATEDWITH ANIONIC LEWIS BASE
LIGANDS
2) THEY BEHAVE AS DONORS OF HARD AND
SOFT LIGANDS,X⁻
3) {BF₄}⁻, {BCl₄}⁻,etc

9. 1) LOBE-HOMO LEWIS BASES ARE ELECTRON
LONE PAIR DONOR SPECIES
2) CHARGE PRESENT IS NEGATIVEOR
NEUTRALWITH A LONE PAIR OF
ELECTRONS
3) INVALENCE BONDTERMS ,THE ELECTRON
PAIR IS AN sp³,sp² OR sp HYBRID ORBITAL.
4) :NH₃,H₂O:,etc

10. 1) Pi-SYSTEM LEWIS BASES HAVETHEIR
ELECTRONS INTHEIR HIGHEST OCCUPIED
MOLECULAR ORBITAL OR HOMO,
DELOCALISED OVERTWO OR MORE p-
orbitals.
2) ELECTRON RICH Pi-SYSTEMS ,Eg: ALKENE,
DIENE,TRIENE,etc.

11.  “INORGANIC CHEMISTRY ” BYW.W.
PORTER FIELD ,FIRST EDITION.
 “FUNDAMENTAL CONCEPTS OF
INORGANIC CHEMISTRY” BYASIM K. DAS
,VOLUMES- 1,2&3 .
 “THEORETICAL INORGANIC CHEMISTRY ”
BY C. M. DAY AND JOEL SELBIN.