| http://www.w3.org/ns/prov#value | - A preferred B group may be represented as ???CfH2fSiR1 g(X)3???g wherein the structure ???CfH2f corresponds to A and the structure ???SiR2 g(X)3???g corresponds to W. Suitably, f=2 to 12, g=0 to 2, X is a hydrolyzable group such as halogen, oxime, alkoxy, aryloxy, alkenoxy or acetoxy and R1 is as previously defined.
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