Search results for "tetramethylethylene"
showing 10 items of 25 documents
CCDC 230611: Experimental Crystal Structure Determination
2004
Related Article: J.Ruiz, C.Vicente, V.Rodriguez, N.Cutillas, G.Lopez, C.R.de Arellano|2004|J.Organomet.Chem.|689|1872|doi:10.1016/j.jorganchem.2004.03.009
Influence de la symétrie et de la taille de la molécule adsorbée sur le processus d'adsorption des composés éthyléniques sur une zéolithe de topologi…
2005
This manuscript lies within the scope of the understanding of the stepped isotherm observed during adsorption, on MFI zeolites, of some organic compounds which have a similar size to that of the pore opening of zeolite. During this work, the process of adsorption of ethylene and tetramethylethylene is initially studied by gravimetry and then by in situ infrared spectroscopy. This last technique enables to follow simultaneously the modifications of the adsorbent and the adsorbate. The analysis of these data lets suppose that the step in adsorption isotherm can be explained by taking account simultaneously of the symmetry and the size of the admolecule. In addition to the infrared bands chara…
Calorimetric study of the solubilization of ethylenediamine, N,N-dimethylaminoethylamine and N,N,N?,N?-tetramethylethylenediamine by reversed AOT mic…
1993
Distribution constants and standard enthalpies of transfer of ethylenediamine (en), N,N-dimethylaminoethylamine (dmen) and N,N,N′,N′-tetramethylethylenediamine (tmen) partitioned between n-heptane and water containing reversed sodium bis(2-ethylhexyl) sulfosuccinate (AOT) micelles as a function of the molar concentration ratio R (R=[water]/[AOT]) were evaluated by a calorimetric method. The results show that en, dmen and tmen molecules, solubilized in the reversed micelles, are distributed between the micellar aqueous core and the micellar palisade layer. An analysis of the thermodynamic parameters of the partition process demonstrates the peculiar solvent properties of the water containing…
Synthesis and Redox Behaviour of the Chalcogenocarbonyl Dianions, [(E)C(PPh2S)2]2−: Formation and Structures of Chalcogen−Chalcogen Bonded Dimers and…
2010
The lithium salts of the chalcogenocarbonyl dianions [(E)C(PPh(2)S)(2)](2-) (E=S (4 b), Se (4 c)) were produced through the reactions between Li(2)[C(PPh(2)S)(2)] and elemental chalcogens in the presence of tetramethylethylenediamine (TMEDA). The solid-state structure of {[Li(TMEDA)](2)[(Se)C(PPh(2)S)(2)]}-[{Li(TMEDA)}(2)4 c]-was shown to be bicyclic with the Li(+) cations bis-S,Se-chelated by the dianionic ligand. One-electron oxidation of the dianions 4 b and 4 c with iodine afforded the diamagnetic complexes {[Li(TMEDA)](2)[(SPh(2)P)(2)CEEC(PPh(2)S)(2)]} ([Li(TMEDA)](2)7 b (E=S), [Li(TMEDA)](2)7 c (E=Se)), which are formally dimers of the radical anions [(E)C(PPh(2)S)(2)](-) (.) (E=S (5 …
Decacyclene as complexation manifold: synthesis, structure and properties of its Fe2 and Fe4 slipped triple-decker complexes.
2006
Reaction of [(eta(5)-Me4EtC5)Fe(II)Cl(tmeda)] (tmeda = N,N,N'N'-tetramethylethylenediamine) with a polyanion solution of decacyclene (1) results in the formation of the triple-deckers [{(eta(5)-Me4EtC5)Fe}2-mu2-(eta(6):eta(6)-decacyclene)] (3) and [{(eta(5)-Me4EtC5)Fe}4-mu4-(eta(6):eta(6):eta(6):eta(6)-decacyclene)] (4). Metal complexation in 3 and 4 occurs on opposite faces of the pi perimeter in an alternating mode. The decacyclene ring adopts a gently twisted molecular propeller geometry with twofold crystallographic symmetry (C2). Complex 4 crystallizes in the chiral space group C222(1); the investigated crystal only contains decacyclene rings with M chirality. The handedness can be ass…
CCDC 224277: Experimental Crystal Structure Determination
2004
Related Article: J.Vicente, J.-A.Abad, R.Clemente, J.Lopez-Serrano, M.C.Ramirez de Arellano, P.G.Jones, D.Bautista|2003|Organometallics|22|4248|doi:10.1021/om0303552
CCDC 207942: Experimental Crystal Structure Determination
2003
Related Article: J.Terrematte, S.Daniele, L.G.Hubert-Pfalzgraf, J.M.Decams, H.Guillon, P.Richard|2003|Inorg.Chem.Commun.|6|1039|doi:10.1016/S1387-7003(03)00160-6
CCDC 821788: Experimental Crystal Structure Determination
2011
Related Article: M.Risto, T.Chivers, J.Konu|2011|Dalton Trans.|40|8238|doi:10.1039/c1dt10646e
CCDC 224280: Experimental Crystal Structure Determination
2004
Related Article: J.Vicente, J.-A.Abad, R.Clemente, J.Lopez-Serrano, M.C.Ramirez de Arellano, P.G.Jones, D.Bautista|2003|Organometallics|22|4248|doi:10.1021/om0303552
CCDC 650176: Experimental Crystal Structure Determination
2008
Related Article: E.Pardo, K.Bernot, F.Lloret, M.Julve, R.Ruiz-Garcia, J.Pasan, C.Ruiz-Perez, D.Cangussu, V.Costa, R.Lescouezec, Y.Journaux|2007|Eur.J.Inorg.Chem.||4569|doi:10.1002/ejic.200700794