Výsledky vyhledávání - "van Hummel, Gerrit J."

Study of conformational behavior of CMP(O)-cavitands by NMR spectroscopy and X-ray analysis in relation to the extraction properties

Autor: Boerrigter, Harold, Verboom, Willem, Hulst, Ron, van Hummel, Gerrit J., Harkema, Sybolt, Reinhoudt, David N., Pons, M.

Publikováno v: NMR in Supramolecular Chemistry, 19-35
STARTPAGE=19;ENDPAGE=35;TITLE=NMR in Supramolecular Chemistry
NMR in Supramolecular Chemistry ISBN: 9789401059503

Tetra-CMP(O)-functionalized cavitands are very effective europium(III) extractants. Cavitand 1b is the strongest ligand and has the highest extraction constant for 1:1 complexation with Eu(picrate)3 (viz. Kex 1 = 2.7 × 1012M−4). The conformational

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::857247942219c05ad5da3229dc2a8a0d
https://doi.org/10.1007/978-94-011-4615-9_2

Zobrazit plný text záznamu

Clathration of properly functionalized calix[4]arenes: C-13 CP-MAS NMR spectroscopy and X-ray crystallography

Autor: Verboom, Willem, Struck, Oliver, Reinhoudt, David N., van Duynhoven, John P.M., van Hummel, Gerrit J., Harkema, Sybolt, Udachin, Konstatin A., Ripmeester, John A.

Publikováno v: Gazzetta chimica italiana, 127(11), 727-739. Societa chimica italiana

The clathrate formation of a series of differently upper-rim-functionalized tetrapropoxycalix[4]arenes has been investigated. In the cases of 5,17-dinitro-, 3, and 5,17-diphthalimidocalix[4]arene, 5, clathrates were obtained with benzene, toluene, p-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::c16ae86f7e641b9160b9976a35281fb1
https://research.utwente.nl/en/publications/clathration-of-properly-functionalized-calix4arenes(66d686f9-adf9-4347-94aa-ee3e240a07f3).html

Zobrazit plný text záznamu

Akademický článek

Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.

Stereochemical Aspects of The 'tert-Amino Effect': 2. Enantio- and Diastereoselectivity in the Synthesis of Quinolines, Pyrrolo[l,2-a]quinolines, and [l,4]oxazino[4,3-a]quinolines

Autor: Nijhuis, Walter H.N., Verboom, Willem, El-fadl, A. Abu, van Hummel, Gerrit J., Reinhoudt, David N.

Publikováno v: Journal of organic chemistry, 54(1), 209-216. American Chemical Society

Thermal isomerization of the optically pure 2-vinyl-N,N-dialkylanilines, with a methyl or an ethyl substituent (R2) at the α-position of the N,N-dialkyl moiety, 4a (R1= H), 4b (R1= CH3), 5a (R1= H), and 6a (Rl= H), affords enantioselectively the opt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::c82b49733d4d9fcf1baa33fe5855e508
https://research.utwente.nl/en/publications/45adf0f9-b581-441f-a60d-7e2d94ec1894

Zobrazit plný text záznamu