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- W2052583103 abstract "Benzene-1,3,5-tri-p-phenylphosphonic acid, 1,3,5-[p-C6H4P(O)(OH)2]3C6H3, (8), a novel building block for applications in supramolecular chemistry, was prepared in two steps with an overall yield of 82%. The [Pd(PPh3)4]-catalyzed Arbuzov reaction of 1,3,5-tris(p-bromophenyl)benzene with P(Oi-Pr)3 afforded benzene-1,3,5-tri-p-phenylphosphonic diisopropyl ester, 1,3,5-[p-C6H4P(O)(Oi-Pr)2]3C6H3 (9). The hydrochloric acid-catalyzed hydrolysis of 9 produced 8, which forms a crystalline salt with p-dimethylaminopyridine (DMAP) in a ratio of 2:3 (as methanol solvate) that was characterized by X-ray crystallography. The supramolecular structure features organic domains of stapled 1,3,5-triphenylbenzene units associated by PO−H···OP hydrogen bonds and π-stacking. These staples are horizontally cross-linked by PO−H···OP hydrogen bonds. The protonated DMAP molecules fill the voids between the staples and participate in the stabilization of the framework by formation of N−H···OP hydrogen bonds. The melting point of the adduct (381 °C) confirms the high thermal stability of the supramolecular framework." @default.
- W2052583103 created "2016-06-24" @default.
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- W2052583103 date "2008-07-23" @default.
- W2052583103 modified "2023-10-02" @default.
- W2052583103 title "1,3,5-Benzene-tri-<i>p</i>-phenylphosphonic Acid. A New Building Block in Supramolecular Chemistry" @default.
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- W2052583103 doi "https://doi.org/10.1021/cg8000569" @default.
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