| http://www.w3.org/ns/prov#value | - , Co, and Mn;n is an integer ranging from about 2 to about 4; andR.sup.4 and R.sup.5 are the same or different and independently selected from the group consisting of H and C.sub.y H.sub.2y+2, wherein y is an integer ranging from 1 to about 5.
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