Understanding the Myriad of Inorganic chemistry

Did you know: What is Bond order of CO+?  Well, it’s 3.5 F2 is best oxidising agent? Well, it’s wrong. Check p-273, Q8.16 NCERT XI Chemistry. Perxenate ion, (XeO6)4– is Stronger oxidising agent than F2. Solid PCl5, solid PBr5, solid GaCl2, solid XeF6, solid N2O5, solid N2O4, solid N2O3 , solid Cl2O6, solid I2Cl6, are […]

Stereoisomerism in Coordination complexes | 22 Tips | Class 12| IIT JEE | AIIMS

Given below are 22 tips to never miss a question on stereoisomerism in complexes. Understand and remember following points. [A and B are monodentate ligands. AA is symmetrical bidentate ligand like en (ethylenediamine or ethane-1,2-diamine), ox (oxalato) etc. AB is unsymmetrical bidentate ligand like gly(glycinato) etc.] 1.Tetrahedral complexes do not exhibit geometrical isomerism as all […]

Effervescence of CO2 with aq NaHCO3

Due to resonance effect(delocalisation of negative charge) phenoxide ion is less basic than alkoxide ion. This means that phenol is more acidic than alcohol. NaHCO3 is the basic sodium salt of carbonic acid, H2CO3 (pKa1 = 6.3, pKa2 =10.25) a diprotic acid which exists only in small amounts in aqueous solution & CO2+H2O↽−−⇀H2CO3 lies mainly on the backward side (this […]

Basic Character of amines

Larger the value of Kb or Smaller the value of pKb (=-logKb), the stronger is the base. Any factor which increases lone-pair availability towards protonation increase the basic character. Electron releasing groups (ERG) increase e- density of bases or stabilises “cationic conjugate acids” & hence increase basic character. Basic Character is proportional to Stability of corresponding […]

Acidic & Basic character – Tricks-Part 1

Generally, phenol derivatives & benzoic acid derivatives have the similar order of acidic character except ortho isomers (ortho effects) in benzoic acid derivatives whereas aniline derivatives have opposite order, however, look out for any exceptions to this trick as we discuss here. Below, acidic character order & pka values of phenol & benzoic acid derivatives […]

Unimolecular & Bimolecular Reactions

An elementary reaction is a single step reaction with a single transition state and no intermediates. The molecularity of a reaction refers to the number of molecules involved in an elementary reaction step. It is the number of molecules coming together to react in an elementary reaction. Molecularity is defined only for “simple/one-step/elementary reactions”. Because […]

All about addition- -elimination ArSN

The generally accepted mechanism for nucleophilic aromatic substitution in nitro-substituted aryl halides is shown by example below: Attack of the strong nucleophile on the halogen substituted aromatic carbon forming an anionic intermediate. Loss of the leaving group, the halide ion restores the aromaticity. Kinetics of the reaction are observed to be second order. The first(addition) […]