| http://www.w3.org/ns/prov#value | - cal wherein the metalloid is selected from Group 14 of the Periodic Table of the Elements, or two adjacent R-groups are joined to form a C4-C20 ring, except that R independently may also be hydrogen except for R groups attached to the carbon atoms directly bonded to the nitrogen atoms; n is l, 2, 3 or 4; each Q is independently a monoanionic ligand; L is a neutral Lewis base; and w is a number fro
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