نتایج جستجو برای: dicationic 4
تعداد نتایج: 1303925 فیلتر نتایج به سال:
An air-stable dicationic Zn2+ complex (1) in a tripod-type ligand with non-bound phosphorus base and three pyridinyl “arms” (TPPh) was synthesized. Remarkably, while 2 mol% of 1 at room temperature selectively catalyzed dehydrogenative borylation terminal alkynes HBPin, lower loading (0.5 mol%) 90 °C promoted hydroboration reaction the same skipping step. The mode action proposed based on exper...
Several new octahedral iron(ii) complexes of the type [Fe(PN(R)-Ph)2X2] (X = Cl, Br; R = H, Me) containing bidentate PN(R)-Ph (R = H, Me) (1a,b) ligands based on 2-aminopyridine were prepared. (57)Fe Mössbauer spectroscopy and magnetization studies confirmed in all cases their high spin nature at room temperature with magnetic moments very close to 4.9μB reflecting the expected four unpaired d-...
Six new dicationic 2D nonlinear optical (NLO) chromophores with pyrazinyl-pyridinium electron acceptors have been synthesized by nucleophilic substitutions of 2,6-dichloropyrazine with pyridyl derivatives. These compounds have been characterized as their PF(6)(-) salts by using various techniques including electronic absorption spectroscopy and cyclic voltammetry. Large red shifts in the intens...
0022-328X/$ see front matter 2009 Elsevier B.V. doi:10.1016/j.jorganchem.2009.11.043 * Corresponding authors. Address: Department of G istry, Faculty of Chemical Technology, University of 573, 532 10 Pardubice, Czech Republic (J. Honzíček). Romão), fax: +420 46603 7068 (J. Honzíček). E-mail addresses: [email protected] (J. Hon Romão). The synthesis of new cyclopenta[l]phenanthrenyl complexes...
The terminal formate complex [(OCHO)Ti(N3N)] (3) containing the trianionic triamido-amine ligand (Me3SiNCH2CH2)3N3- (N3N) was prepared via salt metathesis of [ClTi(N3N)] (1) with sodium formate or alternatively by treatment of the alkyl complex [nBuTi(N3N)] (2) with ammonium formate [HNEt3][OCHO]. Deprotonation of 3 with potassium hexamethyldisilazide gave a polymeric helical chain of the oxo c...
An atom-efficient, eco-friendly, solvent-free, high yielding, multicomponent green strategy to synthesize triazolo[1,2-a]indazole-triones derivatives by the one-pot condensation of aldehyde, dimedone, and phenyl urazole is presented. A series of different substituted aromatic aldehydes including either electron-withdrawing or electron-donating groups used in this reaction participated well and ...
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