Chapter U2.30, Problem 4E

Interpretation Introduction

Interpretation:

Whether each structural formula given is correct as per HONC 1234 rule must be explained. The incorrect structures needs to be corrected.

Concept introduction:

HONC 1234 rule states that in most of the molecule H, O, N and C generally makes 1, 2, 3 and 4 bonds respectively.

Answer to Problem 4E

Compound b and d have violated the HONC 1234 rule.

  

Explanation of Solution

As per the HONC 1234 rule each oxygen (O) atom must form 2 bonds and each nitrogen (N) atom must form three bonds.

As per the structure of b, O has four bonds instead of 2. Thus this is a violation of the rule. Similarly in structure d, N has two bonds instead of three. So it is violation of the rule.

The corrected structures which follow HONC 1234 rule are shown below.

  

Conclusion

Correct structures are shown as per HONC 1234 rule according to which number of bonds formed by H, O, N and C are 1, 2, 3 and 4 respectively.