prov:value
| - (I) AIR3 (II) AlR1 mX3-m (III) AlRn 2 (OR3)3-n wherein each R, R1, R2, R3 is the same or different and is a straight chain or branched alkyl group having 1 to 12 carbon atoms, preferably 1 to 8 carbon atoms, an aryl group (e.g., phenyl or tolyl), or a hydrogen; X is halogen (F, Cl, Br, and I, with Cl preferred); m is 0, 1, 1.5, or 2; and n is 1 or 2.
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