I know that Zinc Iodide and Zinc Bromide has good solutbility in water but I am working on Non-Aqeous systems. So, kindly share if anyone used these chemicals with acetonitrile.
now I'm not putting any effort into looking in literature, as you have, I expect, done your best.
If you cannot find any values: Buy zinc iodide, buy zinc bromide, buy acetonitrile (or, most likely, you have those 3 substances already) and look how much of it you can dissolve in 10 mL of the solvent.
You may find useful to check the signalled papers: http://actachemscand.dk/pdf/acta_vol_44_p0433-0442.pdf http://pubs.rsc.org/en/content/articlelanding/1981/dt/dt9810000336#!divAbstract