# Are there ligands without lone pairs? [closed]

The Nitronium ion, which is a positively charged ligand, in which the donor atom is Nitrogen. The question is, that Nitrogen has a total of 5 electrons, it shares 2 with oxygen and donates 2 electrons to another oxygen and also looses one electron to form a cationic $\ce{NO2+}$. It does not have a lone pair, not even a single electron. How is it a ligand?

@Dissenter: You explain nitronium for the nitration of benzene, in which a covalent bond is formed. I would like to know this for a coordination bond.

I do not have any example, but I see the nitronium ion as a example in a book of PRADEEP publication which is a TRUSTED publisher.

• Are you sure it's not nitro/nitrite, anionic NO2? – jerepierre Oct 4 '14 at 16:24
• Where did you see nitronium described as a ligand in a metal complex? I don't believe nitronium can be, but perhaps you are looking at some unusual situation. The community needs more information to answer the question. – jerepierre Oct 5 '14 at 13:51
• U say about hydrogen proton as a ligand..... can u explain me how it is – nilesh Oct 6 '14 at 9:51
• thanks for your approach.....search. the regarding information as soon as possible.... pradeep publication is of India – nilesh Oct 6 '14 at 9:58
• I have edited your post and tried to clarify what you are actually asking. (I might have terribly failed at this.) Could you please provide the reference, where you found this obscurity. A full citation and a screenshot of the relevant section would be much appreciated. – Martin - マーチン Oct 6 '14 at 10:26