Synthesise a cobalt triphenylphosphite from Cobalt(II) nitrate hexahydrate, Triphenylphosphite and Sodium borohydride. Write the mechanism of...

Synthesise a cobalt triphenylphosphite from Cobalt(II) nitrate hexahydrate, Triphenylphosphite and Sodium borohydride.

Write the mechanism of this reaction.

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Expert Solution

The balanced equation between cobalt(II) nitrate hexahydrate, Triphenylphosphite, and Sodium borohydride can be written as follows.

2Co(NO₃)₂.6H₂O + 8P(OC₆H₅)₃ + 7NaBH₄ 2CoH[P(OC₆H₅)₃]₄ + 7NaOH + 7BH₃ + 9H₂O + 4HNO₂

Explanation: Here, the oxidation and reduction reactions can be written as shown below.

Out of 2*6 = 12 H₂O molecules, 5 water molecules are released.

The remaining 7 H₂O = 7 H⁺ + 7 OH^-.

7OH^- combine with 7 Na⁺ to form 7 NaOH.

Out of 7 BH₄^- = 7 BH₃ + 7H^-.

Oxidation: 5H^- 5H⁺ + 10 e^- (10 electrons are lost)

Reduction: 2Co(NO₃)₂ + 2H^- + 8P(OC₆H₅)₃ + 12H⁺ + 10e^- 2CoH[P(OC₆H₅)₃]₄ + 4HNO₂ + 4H₂O (10 electorns are gained).

queen_honey_blossom answered 1 year ago

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