Sodium borohydride reacts with iodine in the presence of diglyme to give A. A heated at 388 K give B. A heated at 373 K in sealed tube to form C. A further heated at red hot condition to give element D. Find out A,B, C and D. Give the reactions.

Sodium borohydride reacts with iodine in the presence of diglyme to gi

1.	Sodium borohydride reacts with iodine in the presence of diglyme to give A. A heated at 388 K give B. A heated at 373 K in sealed tube to form C. A further heated at red hot condition to give element D. Find out A,B, C and D. Give the reactions.
Answer» Solution :(i) Sodium borohydride reacts with IODINE in the presence of DIGLYME to give diborane (A). `2NaBH_(4)+I_(2)overset("diglyme")(to)underset((A))(B_(2)H_(6))+2NaI+H_(2)` (ii) Diborane (A) heated at 388 K gives PENTABORANE (11)(B) `underset((A))underset(("Diborane"))(5B_(2)H_(6))underset((U-"tube"))overset(388K)(to)underset((B))underset(("pentaborane-11"))(2B_(5)H_(11))+4H_(2)` (iii) Diborane (A) heated at 373 K in the sealed tube to form decaborane (14)(C) `underset((A))underset(("Diborane"))(5B_(2)H_(6))underset("sealed tube")overset(373K)(to)underset((C))underset(("decaborane"-14))(B_(10)H_(14)+8H_(2)` (iv) Diborane (A) heated at red hot conditions to give element boron (D). `underset((A))underset(("Diborane"))(B_(2)H_(6))overset("Red hot")(to)underset((D))underset(("Boron"))(2B)+3H_(2)`