PI5
diphosphorus pentaiodide
Phosphorous Pentaiodide
Bromine Pentaiodide
phosphorus pentaoxide or p2o5 dimerises into p4o10
Arsenic pentaiodide (AsI5) doesn't contain any metal; arsenic is a metalloid and iodine a nonmetal.
PI5
diphosphorus pentaiodide
Phosphorous Pentaiodide
Bromine Pentaiodide
arsenic triiodide.
phosphorus pentaoxide or p2o5 dimerises into p4o10
It is a big "V" shape made up of five iodides
The imaginary compound nitrogen pentaiodide would be NI5 , it would not be an acid- there are no ionisable H atoms. (or a Lewis acid- it has no lone pair.) There is a real compound NI3, a very unstable substance a contact explosive. There is a reported PI5, but that is disputed.
NI5 ?IF it exists it would be Nitrogen PentaIodide. It would also be very unstable (i think) so don't go near it.
The name of this compound is dinitrogen pentasulfide.
Theoretically PI5 should be formed as PCl5 but practically. due to large atomic size 5 iodine atoms can not attached directly with one phosphorus atom