| http://www.w3.org/ns/prov#value | - Nonlimiting examples include titanium tetrachloride, zirconium tetrachloride, or tin tetrachloride. [0028] The Group 15 Lewis Acids have the general formula MXy, wherein M is a Group 15 metal, X is a ligand, preferably a halogen, and y is an integer from 3 to 5.
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