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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Draw the Lewis structure for 1, 1-dimethylhydrazine [(CH3)2NNH2, a compound used as a rocket fuel]. What: is the hybridization for the two nitrogen atoms in this molecule? What orbitals overlap to form the bond between the nitrogen atoms?

Interpretation Introduction

Interpretation:

The Lewis structure of 1, 1-dimethylhydrazine [(CH3)2N-NH2]  has to be drawn. The hybridization for nitrogen atoms in this molecule and the orbitals overlap to form the bond between nitrogen atoms should be determined.

Concept Introduction:

  • Lewis structures are diagrams that represent the chemical bonding of covalently bonded molecules and coordination compounds.
  • It is also known as Lewis dot structures which represent the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.
  • The Lewis structure is based on the concept of the octet rule so that the electrons shared in each atom should have 8 electrons in its outer shell.

Hybridization is the process of mixing of atomic orbitals into new hybrid orbitals. The hybrid orbitals have different energies and shape than the component atomic orbitals.

Important types of hybridizations are listed below,

sp3hybridization: It is the combination of 1-s and 3-p orbitals and thus 4sp3 hybrid orbitals are produced. Single bonds are always having this type of hybridization.

sp2hybridization: It is the combination of 1-s and 2-p orbitals and thus 3sp2 hybrid orbitals are produced. Single bonds are always having this type of hybridization.

Explanation

The number of valence electrons in nitrogen atom is 5

Herein the compound, two nitrogen atoms are bonded to each other, in one nitrogen atom two hydrogen atoms were bonded and to the other nitrogen atom two methyl groups were attached.

In accordance with the octet rule, after the bond formation both the nitrogen atoms have a lone pair of electrons.

Therefore,

The Lewis structure of 1, 1-dimethylhydrazine (CH3)2N-NH2  can be drawn as follows,

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