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Synthetic Route of 14187-32-7, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 14187-32-7, C20H24O6. A document type is Article, introducing its new discovery.
In a systematic search for supramolecular complexes involving all combinations of the cyclic polyethers 12-crown-4 (12C4), 15-crown-5 (15C5), 18-crown-6 (18C6) and dibenzo-18-crown-6 (DB-18C6), and the geminal di- or trisulfones H2C(SO2Me)2, H2C(SO2Et)2, and HC(SO2Me)(3-n)(SO2Et)n (n = 0-3), only the following four complexes could be isolated and unequivocally characterized by elemental analysis and 1H NMR spectroscopy: <(12C4)2> (3), <(18C6)> (4), <(DB-18C6)2> (5) and <(DB-18C6)3> (6).The structure of 3 (triclinic, space group P<*>1) consist of crystallographically centrosymmetric formula units in which the disulfone molecules are bonded on each side of the ring by two C-H…O(crown) interactions originating from the central methylene group (H…O 213 pm) and from the methylene group of one EtSO2 moiety (H…O 237 pm).Formula units related by translation are connected into parallel strands by a third type of reciprocal C-H…O bond (H…O 232 pm) betwen the second H atom of the central methylene group and a sulfonyl oxygen atom of the adjacent unit.The structure of 4 (monoclinic, space group C2/c) showed severe disorder of the crown ether and could not by refined satisfactorily.Compounds 5 and 6 crystallized as long and extremely thin fibres, indicative of linear-polymeric supramolecular structures; single crystals for X-ray crystalography were not available. – Keywords: Di(alkanesulfonyl)methanes, Tri(alkanesulfonyl)methanes, Crown Ethers, Complexes of Uncharged Molecules, Crystal Structure
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Reference：
Chiral Catalysts,
Chiral catalysts – SlideShare