Question

OC. PPh O - D Ph:P. c1 CHE onsider the reaction as shown above, in the iridium complex. 3.5.1 What are these type of reactions called? 3.5.2 Classify each of the substrates used in these reactions. 3.5.3 State which mechanism is preferred by each substrate. 3.5.4 State how you will differentiate between the two mechanisms abov

Answer 1

3.5.1: Both of the above reactions are the examples of the OXIDATIVE ADDITION REACTION

3.5.2: In Oxidative Addition Reaction, the above two substrates can be classified as follows:

(i) NON-POLAR substrate [O2], since dioxygen is the non polar one. (ii) POLAR substrate [CH3I], here the Polarization is takes place.

3.5.3: (i) In First reaction  [O2] the non polar substrate undergoes reaction by CONCERTED PATHWAY.

(ii) In the second reaction [CH3I] the polar substrate undergoes SN2 or RADICAL PATHWAY.

3.5.4: The above two reactions are differentiated by the analysis of the formed product.

In the first reaction, due to the non-polar substrate and it undergoes concerted pathway, the product is formed in the CIS FASHION.

In the second reaction, the presence of the polar substrate, and it undergoes SN2 pathway, the product formed is TRANS FASHION.

Non-polar substrato" Cephe Oc 7 pphz ppha - oo - pphz -I phap a conserted to pathway" pbzpL cl Vaska's complex as product pober substrate онат се Ir cl SNe con ph₂p Radical pathway" Vaska's complex Trams-product