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Synthesis Derivatisation And Characterisation Of Rhenium Mono And Bis6 Benzoic Acid Complexes As Potential Bioorganometallic Building Blocks
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Book Synopsis Synthesis, Derivatisation and Characterisation of Rhenium Mono- and Bis(η6-benzoic Acid) Complexes as Potential Bioorganometallic Building Blocks by : Carla Gotzmann
Download or read book Synthesis, Derivatisation and Characterisation of Rhenium Mono- and Bis(η6-benzoic Acid) Complexes as Potential Bioorganometallic Building Blocks written by Carla Gotzmann and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Derivatization and Characterization of Rhenium/technetium Mono- and Bis(η6-arene) Complexes for the Application in Medicinal Chemistry by : Giuseppe Meola
Download or read book Synthesis, Derivatization and Characterization of Rhenium/technetium Mono- and Bis(η6-arene) Complexes for the Application in Medicinal Chemistry written by Giuseppe Meola and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Optical and Luminescence Studies of Rhenium(i) Diimine Alkynyl Complexes and Their Utilization As Building Blocks for the Assembly of Multinuclear and Mixed-Metal Complexes by : CHAN-FUNG. LAM
Download or read book Synthesis, Optical and Luminescence Studies of Rhenium(i) Diimine Alkynyl Complexes and Their Utilization As Building Blocks for the Assembly of Multinuclear and Mixed-Metal Complexes written by CHAN-FUNG. LAM and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Synthesis, Optical and Luminescence Studies of Rhenium(I) Diimine Alkynyl Complexes and Their Utilization as Building Blocks for the Assembly of Multinuclear and Mixed-metal Complexes" by Chan-fung, Lam, 林親鳳, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled SYNTHESIS, OPTICAL AND LUMINESCENCE STUDIES OF RHENIUM(I) DIIMINE ALKYNYL COMPLEXES AND THEIR UTILIZATION AS BUILDING BLOCKS FOR THE ASSEMBLY OF MULTINUCLEAR AND MIXED-METAL COMPLEXES submitted by LAM Chan Fung for the degree of Doctor of Philosophy at The University of Hong Kong in July 2005 A series of mononuclear rhenium(I) diimine complexes with hyperbranched or functional alkynyl ligands, [C H -1,3-(HC C C H C C) -5-{Re(CO) (N N)(C C 6 3 6 4 2 3 t C H C C)}] (N N = bpy, Bu bpy) and [Re(CO) (N N)(C C C C R)] (R = C H I-p, 6 4 2 3 6 4 C H C C SiMe -p, CHC C H-p, C H OSiMe Bu-p, CHOH-p) have been 6 4 3 6 4 6 4 2 6 4 synthesized. The X-ray crystal structures of [CH-1,3-(HCCCHCC)-5-{Re(CO)(Bubpy)(CCCHCC)}] and 63 64 2 32 64 [Re(CO)(Bubpy)(CCCCCHCCH-p)] have been presented. By employing 32 64 [Re(CO) (N N)(C C C C C H I-p)] as a precursor, a series of dinuclear rhenium(I) 3 6 4 alkynyl complexes with extended conjugation, [Re(CO) (N N)(C CC C C H C C 3 6 4 t (C H ) C C C H C CC C)Re(CO) (N N)] [n = 0, 1; N N = Bu bpy, (CF ) bpy], 6 4 n 6 4 3 2 3 2 have been prepared. Additionally, a series of symmetrical and unsymmetrical trinuclear rhenium(I) alkynyl complexes, [C H -1,3,5-{Re(CO) (N N)(C C C C 6 3 3 t t C H C C)} ] [N N = Bu bpy, (CF ) bpy] and [C H -1,3-{Re(CO) (Bu bpy)(C C 6 4 3 2 3 2 6 3 3 2 C C C H C C C H C C)} -5-{Re(CO) ( Bu bpy)(C C C H C C)}], have also 6 4 6 4 2 3 2 6 4 been synthesized. The lowest-lying excited states of these complexes were 3 3 tentatively assigned as admixture of MLCT[d (Re) *(N N)], LLCT[ (C C R) 3 *(N N)] and IL[ (C C R) *(C C R)] origin. Besides, a series of luminescent heterometallic rhenium(I) palladium(II) t complexes, trans-[Pd(PEt ) Cl{(C C Ar C C)Re(CO) (N N)}] (N N = bpy, Bu bpy; 3 2 3 2 Ar = C H S, C H ) and trans-[Pd(PEt ) {(C C C H C C)Re(CO) ( Bu bpy)} ], have 4 2 6 4 3 2 6 4 3 2 2 been synthesized. The X-ray crystal structures of t trans-[Pd(PEt)Cl{(CCCHCC)Re(CO)(N N)}] (N N = bpy, Bu bpy) have been 32 64 3 2 determined. Their emission was attributed to MLCT[d (Re) *(N N)] 3 phosphorescence mixed with LLCT[ (C C R) *(N N)] character. A lower emission energy for the hetero-bimetallic complex was observed upon coordination of the electron-rich palladium(II) moiety into the rhenium(I) alkynyl system. However, replacement of the remaining chloro group on the palladium centre with an additional rhenium(I) alkynyl moiety resulted in a higher energy emission for the hetero-trimetallic complex. A series of luminescent heterometallic rhenium(I) platinum(II) phosphine complexes, [{Re(CO)(NN)(CCCHCC)}Pt(PP)] [PP = dppe, depe, 3 6 4 2 t cis-(PEt), trans-(PEt ); N N = Bu bpy, (CF ) bpy], have been synthesized. The 32 3 2 2 3 2 X-ray crystal structure of [{Re(CO){(CF)bpy}(C C CH C C)}Pt(dppe)] has 3 3 2 6 4 2 been determined. The emission was ascribed as derived from states of a [d (Re) 3 3 *(N N)] MLCT origin that mixed with LLCT[ (C C R) *(N N)] character; or alternatively, as an excited state of a [ {C C C H C C Pt(P P)} *(N N)] 6 4 metalloligand-to-ligand charge transfer character. Another new class of luminescent heterometallic rhenium(I)platinum(II) polypyridine alkynyl complexes, t [Re
Book Synopsis Synthesis and Characterization of Rhenium (III & V) Schiff Base Complexes for Nuclear Medicine by : Paul Douglas Benny
Download or read book Synthesis and Characterization of Rhenium (III & V) Schiff Base Complexes for Nuclear Medicine written by Paul Douglas Benny and published by . This book was released on 2001 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation investigates the synthesis and characterization of several rhenium Schiff base complexes as potential radiopharmaceuticals for imaging and therapeutic purposes. A series of acetylacetone derived tetradentate N 2 O 2 Schiff base ligands (i.e., acac 2 en, acac 2 pn, acac 2 dmpn) were reacted with a rhenium (V) starting material (i.e., n-Bu 4 N[ReOCl 4], ReOCl 3 (PPh 3) 2) to yield a series of compounds. In most cases, reaction's involving [n-Bu 4 N][ReOCl 4] with two equivalents of ligand in ethanol yielded monomer complexes of the form trans -[ReO(Ligand)X]. The type of axial substituent, X = Cl -, H 2 O, ReO 4 -, MeO -, found trans to the rhenium oxo group can be adjusted by altering the reaction conditions. A similar reaction utilizing ReOCl 3 (PPh 3) 2, one equivalent of the ligand, and triethylamine yielded [mu]-oxo dimer complexes, trans -[Re 2 O 3 (Ligand) 2]. The conversion of rhenium (V) Schiff base monomer complexes into [mu]-oxo dimer complexes was investigated to gain a better understanding of conditions that yield monomer compounds. Experiments reacting trans -[ReO(acac 2 pn)Cl] with various solution conditions led to the proposal of a dimer formation mechanism that involves two pathways: (1) addition of base(OH - ) and (2) addition of water to generate a trans aquo species and additional water molecules to deprotonate the coordinated water molecule. The rhenium (V) monomer complexes, trans -[ReO(acac 2 en)OH 2]Cl and trans -[ReO(acac 2 pn)Cl], were also reacted with phosphine ligands to potentially generate a bis -phosphine(Schiff base)rhenium(III) cationic complexes, trans -[Re(Ligand)(PR 3) 2] + . The trans -[ReO(acac 2 en)H 2 O]Cl complex yielded the Re (III) complex when reacted with phosphines, while the Schiff base ligand of the [trans -ReO(acac 2 pn)]Cl complex underwent an intramolecular rearrangement to yield an asymmetric complex, [cis -ReO(acac 2 pn)PR 3]X. A mechanism is proposed for the rearrangement of the Schiff base ligand in the complex upon treatment with phosphine ligands. Further experiments with other soft monodentate ligands (i.e., thiocyanate, cyanide) yielded neutral asymmetric complexes. A series of experiments investigated the removal radioactive Tc-99 from solution through precipitation. The study focused on precipitating agents that could be added to a simulated waste stream at a uranium reprocessing plant to remove Tc-99 as a pertechnetate ion pair or a reduced Tc (IV) complex.
Book Synopsis Synthesis, Characterization, and Reactivity of Rhenium Dithiodiolate and Monothiodiolate Complexes by : Pitak Chuawong
Download or read book Synthesis, Characterization, and Reactivity of Rhenium Dithiodiolate and Monothiodiolate Complexes written by Pitak Chuawong and published by . This book was released on 2001 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rhenium dithiodiolate, Hydrido-tris-(3,5-dimethyl- 1 -pyrazol yl) borato(ethane- 1,2-dithiodiolato)(oxo)rheni um(V), and Hydrido-tris-(3,5-dimethyl- 1 -pyrazolyl)borato(phenylethanedithiodiolato)(oxo)rhenium(V), were synthesized by reductive cyclocondensation of alkane-1,2-dithiols with Tp'Re03 in a one pot fashion. The rhemium monothiodiolate, Hydrido-tris-(3,5-dimethyl- 1 -pyrazolyl) borato(ethane- 1,2-monothiodiolato)(oxo)rhenium(V), and Hydrido-tris-(3,5- dimethyl- 1 -pyrazolyl)borato(propanemonothiodiolato)(oxo)rhenium(V), were also synthesized by using the same procedure. The syn and anti isomers of rhenium phenylethanedithiodiolate and rhenium propanemonothiodiolate were characterized by using COSY, nOe, and HSQC experiments. An X-ray crystal structure of the rhenium ethanedithiodiolate was obtained, and an unusually small dihedral angle (S-C-C-S) of about 12° was observed. The solution conformation of these compounds was investigated by using a Karplus relationship between vicinal coupling constants and dihedral angle. The dihedral angle for the ethanedithiodiolate appeared to be 38° indicating a staggered geometry for the ring. All of these complexes failed to cyclorevert to any detectable extent at 120°C after 7 days. This observation reflects the thermal stability of rhenium dithiodiolate and monothiodiolate complexes. Energetics of ethylene addition to tetrathioperrhenate anion (ReS4−) and addition of hydrogen sulfide to the alkene adduct were calculated by DFT calculation using LACVP** basis set with B3LYP functionals. The heat of reaction of ethylene addition to ReS4− was 15.4 kcal/mol, and 111.1 kcal/mol for addition of hydrogen sulfide to the alkene adduct. These results are consistent with the stability of the dithiodiolate complex toward cycloreversion reaction. Reaction of Tp'Re03 and ethylene sulfide led to the rhenium ethanedithiolate complex both with and without acid catalysis. This observation led to a proposed multi step mechanism.
Book Synopsis Synthesis and Characterization of Macrocyclic Rhenium Organometallic Complexes by : Kathryn Brown O'Brien
Download or read book Synthesis and Characterization of Macrocyclic Rhenium Organometallic Complexes written by Kathryn Brown O'Brien and published by . This book was released on 1990 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design, Synthesis and Characterization of Novel Rhenium(V) and Technetium(V) Complexes as Potential Radiopharmaceuticals by : Patrick Simon Hlabela
Download or read book Design, Synthesis and Characterization of Novel Rhenium(V) and Technetium(V) Complexes as Potential Radiopharmaceuticals written by Patrick Simon Hlabela and published by . This book was released on 2000 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
