نتایج جستجو برای: keywords transition metal complexes
تعداد نتایج: 2459016 فیلتر نتایج به سال:
The first structurally authenticated [2+2] cycloaddition products of any transition metal hydrazide complexes are reported; cycloaddition products of transition metal hydrazides with alkynes and heteroalkynes have been obtained for the first time; these are the first structurally authenticated cycloaddition products for any transition metal M=NNR(2) functional group.
ligands derived from 8-quinoline, 6-quinoline, 1 -isoquinoline, and 5-isoquinoline were synthesized. these compounds have been used as ligands for complexation of transition metals, such as copper(ii) and nickel(ii). according to the spectrosocopic data, copper(ii) cation forms (i: 1) and (i:2) complexes with 2-(8-quinoly1)-l,l,3,3- tetramethylguanidine and 2- (i '-isoquinoly1)- 1,1,3,3-te...
Development of organometallic chemistry in the past half century is reviewed from the author’s personal viewpoint with focus on the establishment of fundamental concepts relevant to catalysis. Further development in the coming century is expected in view of the diversity of transition-metal complexes and their unique properties. IMPACT OF DISCOVERIES Discoveries of ferrocene and Ziegler catalys...
in this thesis, phosphorus ylides [phbppy], [no2bppy] and [brbppy] have been synthesized through the formation of phosphonium salt and dihydrogenation, followed by the reaction of pd(oac)2 and the orthopalladated dinuclear complexes [pd(?-cl)(phbppy)]2, [pd(?-cl)(no2bppy)]2 and [pd(?-cl)(brbppy)]2 have been produced. the reaction of dinuclear complexes and bidentate ligands [l = bipy (2,2-bipyr...
Recent syntheses of ruthenium complexes of [2.2]paracyclophane provided a highly interesting class of compounds, the multilayered transition metal complexes of cyclophanes. The present study discloses that arene-metal exchange procedures with ferrocene derivatives, effected either photochemically or by Lewis acid catalysis, are convenient methods for preparing the analogous multilayered iron co...
New silica supported Schiff base ligands were prepared by the condensation reaction of 4,6-diacetylresorcinol with silica-gel derivatives, which modified with 3-aminopropyltriethoxysilane and N-(2-aminoethyl) -3-aminopropyltrimethoxysilane. Metal ion uptake capacities of these compounds were studied towards of selected transition metal (Cd(II), Cu(II), Co(II), Mn(II), Pb(II) and Ni(II)) cations...
A new heterocyclic Schiff base ligands and their complexes have been synthesized from 4-aminoantipyrine, thiophene-2-Carboxaldehyde and 2-amino benzoic acid. The ligands and its transition metal complexes of Cu (II), Co (II), Ni (II) and Zn (II) are characterized by UV, FTIR NMR and Mass studies. The antibacterial and antifungal activity of the ligands and the metal complexes were tested.
Many transition metal complexes accomplish or catalyze the oxidation of C H, O H, and other -bonds. Under aerobic conditions, metal complexes typically modulate an autoxidation radical chain. In anaerobic reactions, a metal complex can be the reactive species that attacks t c a r h s d ©
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