Crystal structure of 5,11,17,23-tetra-tert-butyl-25,26-bis (diphenyl-phosphinoylmethoxy)-27,28-bis(benzoylmethoxy)calix[4]arene–ethyl acetate–hexane (1:1:0.5), C86H90O8P2·C4H8O2·0.5C6H14, a new cavity-shaped ligand with eight oxygen donors Crystal structure of 11,23-bis-(tert...
heteroarenes. Ligand used for the Pd-catalyzed reaction of propargyl-substituted malonate esters with aryl halides. Ligand used for the Pd-catalyzed decarboxylative coupling of tertiary cyanoacetate salts with aryl halides and triflates. Ligand used for the Pd-catalyzed hydroesterification of alkynes. ...
Four-and five-co-ordinate lanthanide (II) aryloxides: X-ray structures of the bis(2,6-di-t-butyl-4-methylphenoxo)ytterbium(II) complexes [Yb(OAr)2(L)2] and [Yb(OAr)2(L′)3][ArC6H2But2-2,6-Me-4, L = tetrahydrofuran (thf) or OEt2, L′= thf] Four-and five-co-ordinate ...
tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydro-1(2H)-pyridinecarboxylate Conditions ConditionsYield With 1,1'-bis(diphenylphosphino)ferrocene; potassium acetate; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride at 80℃; 100% With 1,1'-bis-(dipheny...
The zinc(II) cation is coordinated to one oxygen and four nitrogen atoms: the pyridine nitrogen atoms (N22 and N32), tertiary amine nitrogen atoms (N1 and N4) and phenolate oxygen atom (O10). H-1 and C-13 NMR spectral data show a rigid solution structure for 1 in agreement with X...
A method for the synthesis of substituted 3,4-cycloalkeno-3′,4′-dihydro(3,4:2′, 1′)naphthopyrylium salts and the corresponding pyridine bases has been developed.doi:10.1007/BF00957360G. N. Dorofeenko1. Rostov-on-Don State University, USSR ;Yu. A. Zhdanov...
The ligand 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine forms a 2:2 complex with silver(I) rather than the expected [4×4] grid; each of the two silver centres is in a near square-planar coordination environment.关键词: 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine Silver complex Crystal struc...
tertiary amines, pyridine, furan, thiophene, 1,1,1-trichloroethane, nitroalkanes such as nitromethane, nitriles such as acetonitrile, sulphoxides such as dimethyl sulphoxide, sulphones, hexamethylphosphoramide, liquid sulphur dioxide, selenium oxychloride. These have high permittivities (εr>15) and...
“Alkyl” is a C1-C18 hydrocarbon moiety containing normal, secondary, tertiary or cyclic carbon atoms. Examples of alkyl radicals include C1-C8 hydrocarbon moieties such as: methyl (Me, —CH3), ethyl (Et, —CH2CH3), 1-propyl (n-Pr, n-propyl, —CH2CH2CH3), 2-propyl (i-Pr, i-propy...
Typical alkyl groups include, but are in no way limited to, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tertiary butyl, pentyl, hexyl, and the like. As used herein, “alkoxy” refers to the formula —OR wherein R is an alkyl as is defined above, such as ““C1-9 alkoxy” ...