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Why does NO2 dimerise?

 Why does NO2 dimerise?

Grade:12

8 Answers

Himalaya Pramanick
63 Points
8 years ago
In NO2 structure there is an unpaired electron left on Nitrogen atom, so it is reactive it dimerises to pair up its electron and gains stability as N2O2.  Refer to NCERT for the bent structure of NO2.
grenade
2061 Points
8 years ago
 NO2 contains odd number of valence electrons. It behaves as an odd electron molecule and therefore undergoes dimerisation to form stable N2O4 molecule with even number of electrons
Binay Kumar Prasad
12 Points
7 years ago
86
There is always a tendendy of atoms in the molecules to attain most lowest oxidation state, because lower oxidation state provide more stability to that particular atom in the molecule. In NO2 the oxidation state of Nitrogen is +2 hence it always makes an effort to reduce it further to +1 or better to 0. Therefore it combines with another NO2 molecule and attain oxidation state of +1 from +2 (earlier). This is the reason that NO2 dimere
Binay Kumar Prasad
12 Points
7 years ago
here is always a tendendy of atoms in the molecules to attain most lowest formal charge on itself, because lower formal charge provide more stability to that particular atom in the molecule . In NO2 the formal charge of Nitrogen is +2 hence it always makes an effort to reduce it further to +1 or better to 0. Therefore it combines with another NO2 molecule and attain formal charge of +1 from +2 (earlier). This is the reason that NO2 dimere
257
Aman
15 Points
5 years ago
no2 contain odd number of valance electrons.  Behaves as a typical molecule.  In the liquid and solid state , of electron . Therefore , NO2 is paramagnetic , while N2O4 is diamagnetic in which two unpaired electrons get paired
Ankit
15 Points
5 years ago
NO2 is an odd electron (7+2×8=23)molecule.In the vlance shell,N has seven electron and hence is less stable.To become more stable by having even(8)number of electron in the valence shell it undergoes dimerization to from N2O4
Khushboo
15 Points
5 years ago
NO2 contains an odd no. of valence electrons and behaves as a typical odd mol. . On dimerisation it converts into a stable mol. eith even no. of electrons.
Thanku
Yash Chourasiya
askIITians Faculty 256 Points
3 years ago
Dear Student

NO2contains odd number of valence electrons. It behaves as an odd electron molecule and therefore undergoes dimerisation to form stable N2O4molecule with even number of electrons.

I hope this answer will help you.
Thanks & Regards
Yash Chourasiya

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