Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"Nickel (ii) complexes"”.
-
Electronic Structure of Tetragonal Nickel(ii) Complexes
Made available in DSpace on 2014-12-09T17:36:16Z (GMT). No. of bitstreams: 1 6910835.pdf: 3498301 bytes, checksum: 585e647b543b8823bd994c04dfdccef8 (MD5) Previous issue date: 1968
-
Characterization of tetranuclear manganese complexes and thermochromic copper(II) and nickel(II) complexes
… properties of four tetranuclear manganese complexes that are potential models for the oxygen evolving complex of photosystem II are examined. The complexes, based upon x-ray crystallography are cubane like structures containing a single manganese ion with a +4 oxidation state and three …
-
Photophysical studies of silver(I), platinum(II), palladium(II), and nickel(II) complexes and their use in electronic devices.
… group 10 metals and (b) silver(I)-phosphine complexes. The scope of the work involved the delineation of the electronic structure of these complexes in different environments and their use in electronic devices. The first topic is a look at the luminescence of tetrahedral silver(I)-phosphine …
-
Progressive design and self-assembly of supramolecular architectures : based on metallamacrocyclic nickel(II) complexes with bipodal tetra-alkylaroylbis (thioureas)
… ligands to form metallamacrocyclic square planar nickel(ll) complexes via self-assembly. Metal : ligand stoichiometries of either 2:2 or 3:3 can be achieved by using meta- or para- substituted ligands. The metallamacrocyclic complexes are subsequently converted into octahedral adducts via the …
-
Computation of Phosphorus-31 NMR chemical shifts of nickel complexes using density functional theory
… shifts of phosphorus-containing ligands in nickel(0), nickel(II), and nickel(I) complexes is presented. Calculated shifts are directly compared to experiment. Many of these complexes are synthetically useful and on the cutting edge of rational catalyst design. Excellent results are obtained …
-
Iron Complexes of 1, 4, 8, 11-Tetramethyl-1, 4, 8, 11-Tetraazacyclotetradecane and Nickel(ii) Complexes of Penta- and Octamines Derived From the Fourteen Membered Macrocyclic Tetramine 1, 4, 8-Trimethyl-1, 4, 8, 11-Tetraazacyclotetradecane
Made available in DSpace on 2014-12-13T20:10:22Z (GMT). No. of bitstreams: 1 7811252.pdf: 5344630 bytes, checksum: ffe09ff11e4e158cf744a38f7f5d09ac (MD5) Previous issue date: 1978
-
Synthesis and characterisation of Acylhydrazinatometallomesogens
… the synthesis and characterisation of Ni2 complexes based on the N-alkylideneacylhydrazine ligand. The primary aims of this project were to synthesise and characterise a series of metallomesogens based on the N-allcylideneacylhydrazine ligand by studying the alternation of mesophase to …
-
Synthesis and use of bench-stable precatalysts with heck-type activation and progress towards the continuous-flow synthesis of atorvastatin
… new class of bench-stable N-heterocyclic carbene nickel precatalysts for homogeneous nickel-catalysis. The nickel(II) complexes are readily activated to Ni⁰ in situ under mild conditions, via a proposed Heck-type mechanism. The precatalysts are able to facilitate carbonyl-ene, hydroalkenylation, …
-
High-pressure studies of solid state reactions in organometallic copper(II) and nickel(II) systems
… isomerization reactions in organometallic copper(II) and nickel(II) complexes. Electronic absorption spectroscopy is used to assess configuration and changes in configuration induced by pressure. Pathways for solid state isomerizations reactions are discussed. Studies of polycrystalline complexes …
-
Metallkomplexe als Katalysatoren für selektive Olefinoligomerisierungen
… novel organic ligands and the respective metal complexes, to be applied for ethylene and propylene oligomerisation. A group of tridentate imino-ligands was synthesised, which includes the 2,6-bis(imino)pyridines 1-2, the 2,6-diacetyl-monoiminopyridine 3, the iminophosphines 16, and the …
-
An investigation of the nickel (II) and cobalt (II) complexes employing pentadentate ligands derived from salicylaldehyde and bis (3,3'- aminopropyl) ether or sulfide
Complexes of the general formula M(X-SALDAPE) and M(X-SALDAPS) formed by the reaction of substituted salicylaldehydes and bis(3,3'-aminopropyl)ether or bis(3,3'-aminopropyl)sulfide with nickel(II) and cobalt(II) have been isolated. The complexes have been characterized by elemental analysis, mass …
-
Diazine-bridged coordination polymers of copper and nickel : synthesis and thermal, spectral, structural, and magnetic properties
… of coordination compounds of copper(I), copper (II) and nickel (II) have been prepared and characterized by thermal, spectroscopic and X-ray diffraction methods as well as by elemental analysis and magnetic susceptibility measurements. The neutral ligands used in the study were pyrazine …
-
Reactions of leuco dyes on acid activated clays
… was accomplished using bis(dithiocarbamato)nickel(II) complexes and it was found that some hydroxy-possessing species conferred improved photo-stability upon the developed dyes, especially towards fluorans, and to a lesser degree towards phthalides. The dark development of carbazolyl blue …
-
An investigation of nickel(II), copper(II) and cobalt(II) complexes employing bidentate ligands derived from 2(β-ketoalkyl) heteroaromatic compounds
Ni(L)₂ complexes, where L equals 2-(trifluoroacetyl heteroaromatic anion were prepared and characterized. 2-(Trifluoroacetyl)picolinato anion (TFAP) gives a Ni(L)₂ complex that appears to be a 5-coordinate square pyramid dimer. The complexes Ni(4MeTFAP)₂ and Ni(5MeTFAP)₂ are square planar complexes …