An organoruthenium complex (–[biphRuCp]PF6–; biph = –(C6H4)2–, Cp = C5H5), constructed within a biphenylene-bridged inorganic–organic hybrid mesoporous material (HMM–biph) by use of a simple ligand-exchange reaction, has been used as a heterogeneous catalyst. UV–visible and X-ray absorption fine structure (XAFS) studies furnished evidence that the structure of the complex is closely similar to that of [(C6H6)RuCp]PF6, suggesting that the biphenylene moiety within HMM–biph directly coordinates the metal center of the organoruthenium complex. The –[biphRuCp]PF6– complex constructed within the HMM–biph (HMM–biphRuCp) catalyzes hydrosilylation of 1-hexyne with triethylsilane in a solid–gas heterogeneous system and gives α-vinylsilane as a main product. Moreover, HMM–biphRuCp has higher catalytic activity than the –[phRuCp]PF6– (ph = –C6H4–) complex constructed within phenylene-bridged HMM (HMM–phRuCp). The high catalytic performance of HMM–biphRuCp can be attributed to the high loading of the HMM–biph with the Ru complex, because of the electron-donating ability of the biphenylene moieties.
Research on Chemical Intermediates – Springer Journals
Published: Oct 30, 2013
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