Cesium Tropenylium Nonahydrodecaborate

Synthesis and properties of 1,2-(2,3-naphtho)-o-carborane

“…The structures of the adducts are established by their nmr spectra, which show no absorptions downfield from 6.6-6.85, too high for fully aromatic protons ( 7.17-7.4) which would arise if addition were to the inner ring, leaving the outer aromatic.6 Dimethyl acetylenedicarboxylate gave the adduct 8 and maleic anhydride gave 9. One might expect naphthocarborane (1) to react very rapidly with tetracyanoethylene (TCNE). Surprisingly, we were unable to make the reaction go at all and recovered unchanged 1 after 8 hr in a sealed tube at 110°or refluxing (6) The peaks assigned to the bridgehead protons, 5 4.62 in 8 and 4.07 in 9, might seem too far downfield for saturated CH but are consistent with other bridgehead CH observed in bicyclooctenes:…”

“…Before finding the successful combination, we tried to debrominate 5 with zinc dust in dimethylformamide. A yellow solution was obtained, but on aqueous work-up the only products isolated were dihydronaphthocarborane (4) and 5-keto-5,8-dihydronaphthocarborane (6). 0 Attempts to dehydrogenate dihydronaphthocarborane (4) with palladium on charcoal or rhodium on alumina in refluxing xylene failed.…”

“…In contrast to benzocarborane,3 naphthocarborane (1) is highly reactive toward a variety of electrophilic reagents. The first one we had to contend with was atmospheric oxygen, which attacks solutions of 1 fairly rapidly, the solid more slowly, to yield a polymeric peroxide (7). A sample we obtained had a molecular weight of 1700 and showed a broadened CH band in the nmr at 7.35.…”

Achieving efficient and large-scale preparation of mesophase-nylon 11 film by random copolymerization of nylon 11 and nylon 611

“…The average heat of fusion (DH f 0 ) from 100% perfect nylon 11 (244 J g À1 ) and nylon 69 (257 J g À1 ) crystals is used for crystallinity calculation. 24,25 Because the average heat fusion used to estimate crystallinity is inaccurate, 22 the resultant crystallinity is most suitable to indicate the effect of processing conditions on crystallinity. As shown in Fig.…”

Using Artificial Neural Networks to Boost High‐throughput Discovery in Heterogeneous Catalysis

“…In turn the QSAR approach in the strict sense cannot be carried out for material discovery in HT program except possibly for highly crystalline compounds. The high complexity of solids (open parameter space) with respect to molecules or drugs makes the design of relevant libraries a challenge and others strategy shall be applied for the development of materials [9,10]. Instead, materials are mainly described by their macroscopic synthesis parameters regardless what they are at the atomic level.…”