Diborane Structure (B2H6) : bridge bonds .

The structure of the diborane is shown in figure.The four terminal hydrogen atoms and the two boron atoms lie in one plane. Above and below this plane, there are two bridging hydrogen atoms. The four terminal B-H bonds are regular two centre-two electron bonds while the two bridge (B-H-B) bonds are different and can be described in terms of three centric two electron bond (3C -2e Bond).

Urotropine : Hexamethylenetetramine is used as a urinary antiseptic medicine

Mesitylene : 1,3,5- trimethylbenzene.l

 When Acetone distilled with conc H2SO4 gives  mesitylene.

Williamson's Synthesis.

⇒It is the laboratory method for the preparation of ethers. 

⇒It is a nucleophilic substitution reaction and proceeds through the SN2 mechanism.

⇒ Order of reactivity of primary halide is CH3X > CH3CH2X > CH3CH2CH2X. 

⇒ Tendency of alkyl halide to undergo elimination is 3º > 2º > 1°. 

⇒ For better yield alkyl halide should be primary and alkoxide should be secondary or tertiary. 

Which one of the following electrophile is used in given Reimer-Tieman Reaction ? (IIT JEE ADVANCED P: 2 2007)

Which one of the following intermediate form in given Reimer-Tieman Reaction ? (IIT JEE ADVANCED P: 2 2007)

Which one of the following reagents is used in given Reimer-Tieman Reaction ? (IIT JEE ADVANCED P: 2 2007)

(a) aq. NaOH + CH3Cl 

(b) aq. NaOH + CH2Cl2 

(c) aq. NaOH + CHCl3 

(d) aq. NaOH + CCl4

Ans Key : (C)

In the following Reimer-Tieman Reaction, the product(s) is (are) (JEE ADVANCED 2013)

Ans key :[2 (Q) and 4 (S)]