Detail of "31249-95-3"

Reference

The macrocyclic and cryptate effect

The macrocyclic and cryptate effect. 7. Influence of structural changes on the complexation behavior of aza crown ethers and cryptands in different solvents. Buschmann, H. J. (Phys. Chem., Univ.-GH Siegen, Siegen D-5900, Fed. Rep. Ger.In this article, certain chemicals are used. Some of their cas registry numbers are 31249-96-4 and 31249-95-3 ). Inorg. Chim. Acta, 120(2), 125-9 (English) 1986. CODEN: ICHAA3. ISSN: 0020-1693. DOCUMENT TYPE: Journal CA Section: 68 (Phase Equilibriums, Chemical Equilibriums, and Solutions) The complex formation of several mono- and bivalent cations with aza crown ethers, cryptands, and the dilactam analogs of both ligands was studied in MeOH and MeCN by calorimetric and potentiometric titrn. The complex stabilities of the dilactam ligands are reduced by a factor of >106 compared with the unsubstituted ligands. This decrease is caused mainly by a strong redn. in the values of the reaction enthalpies. The variation of the mono- and bicyclic ligand structures causes a complete loss of the macrocyclic and cryptate effect. .

Improved methods for synthesis of diazacrown ethers and cryptands

Improved methods for synthesis of diazacrown ethers and cryptands. Popkov, Yu. A.; Korovin, Yu. V.; Nazarenko, N. A. (Fiz. Khi. Inst., Odessa, Ukraine). Ukrainskii Khimicheskii Zhurnal (Russian Edition), 62(3-4), 62-64 (Russian) 1996 Institut Obshchei i Neorganicheskoi Khimii NAN Ukrainy. CODEN: UKZHAU. ISSN: 0041-6045. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Diaza-15-crown-5, diaza-18-crown-6, and benzodiaza-18-crown-6 were prepd. by cyclocondensation of oxa- and dioxaalkanediamines with triethylene glycol ditosylate and 2,2'-(o-phenylenedioxy)bis[ethanol] ditosylate in the presence of CaO or BaO. Cyclocondensation of these products with ditosylates in the presence of LiOH or BaO gave [2.1. 19249-03-7 and 31249-95-3 which are cas registry numbers of chemicals are mentioned.1], [2.2.2], and [2B.2.2]cryptands. Yields of the diazacrown ethers and cryptands were 53-72%. .