The triply bonded complex [Mo2Cp2(μ-H)-(μ-PCy2)(CO)2] (Cp = η5-C5H5) reacts readily at room
temperature with a great variety of simple molecules,
resulting in diverse processes, as illustrated by its
reactions with CO (addition), CNtBu (insertion), and
HSnPh3 (H2 elimination). This unsaturated hydride also
easily incorporates 17e [MoCp(CO)3] or 16e [MnCp‘(CO)2] metal fragments to give 46e heterometallic clus-ters (Cp‘ = η5-C5H4Me).
A new generation of porous polymer networks has been obtained in quantitative yield by reacting two rigid trifunctional aromatic monomers (1,3,5-triphenylbenzene and triptycene) with two ketones having electron-withdrawing groups (trifluoroacetophenone and isatin) in superacidic media. The resulting amorphous networks are microporous materials, with moderate Brunauer-Emmett-Teller surface areas (from 580 to 790 m g), and have high thermal stability. In particular, isatin yields networks with a very high narrow microporosity contribution, 82% for triptycene and 64% for 1,3,5-triphenylbenzene. The existence of favorable interactions between lactams and CO molecules has been stated. The materials show excellent CO uptakes (up to 207 mg g at 0 °C/1 bar) and can be regenerated by vacuum, without heating. Under postcombustion conditions, their CO/N selectivities are comparable to those of other organic porous networks. Because of the easily scalable synthetic method and their favorable characteristics, these materials are very promising as industrial adsorbents.
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