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Synthesis, x-ray crystal structures, and cation-binding properties of alkyl calixaryl esters and ketones, a new family of macrocyclic molecular receptors
Des calix[n]arenes (n=4, 6, 8) portant des cetoesters sont etudies; pour n=4, ils presentent a l'etat solide une conformation en cone, leurs cryptates avec des metaux alcalins sont egalement etudies
Oxidative addition of aryl–halogen bonds to platinum(II) and the structure of a complex formed by aryl–fluoride oxidative addition
The complexes [PtMe2(Me2NCH2CH2NCHAr)] react by oxidative addition of the aryl–halogen bond when Ar = 2-BrC6H4, 2-CIC6H4, or C6F5 but by ortho-metallation when Ar = 2-FC6H4 or C6H5, and in the case
Tris(4-methoxyphenyl)methanol, C 22 H 22 O 4 , crystallizes in space group P2 1 with two molecules in the asymmetric unit. The molecules are linked into dimers by a weak O-H...O hydrogen bond [O...O
1,2-Bridged Calix[4]arene Monocrowns and Biscrowns in the 1,2-Alternate Conformation†
The condensation of 1,2-di[(2-pyridylmethyl)oxy]calix[4]arenes 1 (R = tBu, H) with glycol ditosylates 2a−e in anhydrous toluene in the presence of tBuOK has led to a mixture of 1,2-alternate and cone
2,4,6-Halogeno-Aniline Derivatives
The title compounds, 2,4-dibromo-6-chloroaniline, C6H4Br2ClN, (1), N-acetyl-4-bromo-2,6-dichloroaniline (alternative name: 4′-bromo-2′,6′-dichloroacetanilide), C8H6BrCl2NO, (2), and
Tribenzyltin Acetate, a Redetermination
This redetermination of the structure of tribenzyltin acetate, [Sn(C 2 H 3 O 2 )(C 7 H 7 ) 3 ], has confirmed the structure determined previously from photographic data [Alcock & Timms (1968). J.
Chemically modified calix[4]arenes. Regioselective synthesis of 1,3-(distal) derivatives and related compounds. X-Ray crystal structure of a diphenol-dinitrile
p-tert-Butylcalix[4]arene has been chemically modified in a regioselective manner at the 1,3-(distal) phenolic groups of the lower rim using electrophiles such as ethyl bromoacetate, chloroacetone,