Thermal stability of interhalogen compounds I am striving over the question that what would be the stability order of the following interhalogen compounds : $\ce{ClF3, BrF3}$ and $\ce{IF3}$. 


One probable answer I got is that stability of interhalogen compounds decreases as the size of central atom decreases due to electronegativity difference. Hence, the stability order should be $\ce{IF3} &gt; \ce{BrF3} &gt; \ce{ClF3}$.


Is the above mentioned logic correct? Can someone please elaborate?
More electronegativity difference generally gives you stronger bonds,  therefore higher thermal stability (i.e. you need to put in more energy to break them). Also, there are 2 lone pairs on the central atom and 3 on each F. Thus, interhalogen compounds of this type with larger central atom would experience less electron pair repulsion. So, I believe that the correct order is $\ce{IF3&gt;BrF3&gt;ClF3}$ as you suggested.