Inorganic 1,3-dipolar compounds
Electrically neutral inorganic molecules carrying a positive and a negative charge in one of their major canonical descriptions. In most dipolar compounds the charges are delocalized; however the term is also applied to species where this is not the case. The term 1,3-dipolar compounds is used for those in which a significant canonical resonance form can be represented by a separation of charge over three atoms (in connection with 1,3-dipolar cycloadditions).
Below are a few examples of inorganic 1,3-dipolar compounds found in the ClassyFire database.