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Synthesis And Characterisation Of Palladium And Platinum Complexes Of Chalcogen Containing Ligands
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Book Synopsis Synthesis and Characterisation of Palladium and Platinum Complexes of Chalcogen-containing Ligands by : Mark Ralph Lewtas
Download or read book Synthesis and Characterisation of Palladium and Platinum Complexes of Chalcogen-containing Ligands written by Mark Ralph Lewtas and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterisation of Palladium and Platinum Complexes of Chalcogen-containing Ligands by : Mark Ralph Lewtas
Download or read book Synthesis and Characterisation of Palladium and Platinum Complexes of Chalcogen-containing Ligands written by Mark Ralph Lewtas and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization and Redox Studies of Platinum and Palladium Complexes with Mer-coordinating Ligands by : Seher Kuyuldar Tastan
Download or read book Synthesis, Characterization and Redox Studies of Platinum and Palladium Complexes with Mer-coordinating Ligands written by Seher Kuyuldar Tastan and published by . This book was released on 2009 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic, structural, spectroscopic, and redox studies of platinum(II) and palladium(II) compounds with mer-coordinating ligands have been undertaken in an effort to better understand the role of the metal and the ligands in controlling d^6/d^8 electron-transfer reactions. A series of Pd(pip2NCN)X (pip2NCNH=1,3-bis(piperdylmethyl)benzene) and [Pd(pip2NNN)X]X (X=Cl, Br, I) (pip2NNN=2,6- bis(piperdyl-methyl)pyridine) complexes are reported. Electronic spectra are consistent with stabilization of ligand-to-metal-charge-transfer states as the ancillary ligand is varied along the ClBr
Book Synopsis D10 Palladium and Platinum Complexes with Alkene and Diimine Ligands by : Janet Lynne Whittemore
Download or read book D10 Palladium and Platinum Complexes with Alkene and Diimine Ligands written by Janet Lynne Whittemore and published by . This book was released on 1990 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigations of the Reactivity of Palladium and Platinum Complexes with Molecular Oxygen and Characterization of a Gold(III)-alkene Complex by : Margaret Louise Scheuermann
Download or read book Investigations of the Reactivity of Palladium and Platinum Complexes with Molecular Oxygen and Characterization of a Gold(III)-alkene Complex written by Margaret Louise Scheuermann and published by . This book was released on 2013 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the reactivity of metal complexes with molecular oxygen will facilitate the development of catalysts that can enable the widespread use of molecular oxygen as an oxidant for organic synthesis. This thesis presents two new classes of reactions between metal complexes and molecular oxygen. Neutral five-coordinate Pt complexes were tested for reactivity in the presence of molecular oxygen. In arene solution, the complexes (t̳B̳u̳̳M̳e̳2̳ nacnac)PtMe3 (1, t̳̳B̳u̳M̳e̳2̳ nacnac- = [((4-tBu-2,6-Me2C6H2)NC(CH3))2CH]-), (M̳e̳3̳ Me-nacnac)PtMe3 (2, M̳e̳3̳ Me-nacnac- = [((2,4,6-Me3C6H2)NC(CH3))2CCH3]-), and (t̳B̳u̳2̳ PyPyr)PtMe3 (3, t̳B̳u̳2̳ PyPyr- = 3,5-di-tert-butyl-2-(2-pyridyl)pyrrolide) reacted immediately with oxygen to form peroxo species in which two oxygen atoms bridge between the metal center and a carbon atom in the ligand backbone. In contrast, no reaction between ( i̳P̳r̳2̳ AnIm)PtMe3 (4a, i̳P̳r̳2̳ AnIm− = [o- C66H4-{N(C6H3 i Pr2)}(CH=NC6H3 i Pr2)]−) or (M̳e̳3̳ AnIm)PtMe3 (4b, M̳e̳̳3̳ AnIm− = [o-C6H4- {N(C6H2Me3)}(CH=NC6H2Me3)]−) and oxygen was observed. As activation of oxygen by five- coordinate PtIV species was found to involve cooperation between the metal center and the ligand, the ability of the ligand to participate in the oxygen binding appears to be a vital component. Oxygen atom transfer reactions of the novel peroxo species are also presented. In a separate study, an unusual reaction involving the activation of both molecular oxygen and a C-H bond at the same metal center was investigated. Pd(P(Ar)(tBu)2)2 (15, Ar = naphthyl) was found to react with molecular oxygen at room temperature in arene solvent to form a hydroxide dimer in which one equivalent of phosphine per Pd was lost and the remaining phosphine was cyclometalated through the naphthyl ring. At low temperature, two intermediates were observed. The nature of these intermediates suggests a mechanism involving initial reaction of Pd(P(Ar) (tBu)2)2 with O2 followed by the C-H activation step. In a final chapter unrelated to oxygen reactivity, the generation and characterization of a gold III̳-alkene complex by NMR and X-ray crystallography is presented. Such species have been proposed as intermediates in catalytic reactions but until recently none had been observed.
Book Synopsis The Chemistry of Platinum and Palladium: with Particular Reference to Complexes of the Elements by : F. R. Hartley
Download or read book The Chemistry of Platinum and Palladium: with Particular Reference to Complexes of the Elements written by F. R. Hartley and published by . This book was released on 1973 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Bimetallic Palladium, and Platinum Complexes Resulting from Chelating Tertiary/secondary Diphosphine Ligands by : Carolyn Supplee
Download or read book Synthesis and Characterization of Bimetallic Palladium, and Platinum Complexes Resulting from Chelating Tertiary/secondary Diphosphine Ligands written by Carolyn Supplee and published by . This book was released on 1989 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Electrochemistry Studies of Palladium and Platinum Complexes Containing Chiral C[subscript]2-symmetric Bis(oxazoline) Ligands and Platinum Complexes of the Chiral C[subscript]2-symmetric Bidentate Phosphine Ligand Diop by : Kara Leigh Cetto
Download or read book Synthesis and Electrochemistry Studies of Palladium and Platinum Complexes Containing Chiral C[subscript]2-symmetric Bis(oxazoline) Ligands and Platinum Complexes of the Chiral C[subscript]2-symmetric Bidentate Phosphine Ligand Diop written by Kara Leigh Cetto and published by . This book was released on 2003 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an effort to design complexes in which electrochemical reduction does not result in loss of the chiral ligand, five different bis(oxazoline) ligands were prepared (3, 5, 7, 8 and 9). 3 was found to have poor solubility and an exceedingly negative reduction potential of Ep[subscript]c= -2.38 V. Chemical reduction studies of 5 revealed that the bis(oxazoline) ligand is ejected during the reduction process. Compound 7 was found to have a reduction potential of Ep[subscript]c= -1.12 V. However, ejection of the chiral ligand occurs when other bis(oxazoline) platinum and palladium dichloride complexes are reduced. Therefore, a neutral PdClMe complex (8) with a reduction potential of Ep[subscript]c= -2.97 V and a cationic Pd(CH[subscript]3CN)Me complex (9) (Ep[subscript]c= -1.38 V) were also prepared. A platinum complex of the bidentate phosphine ligand was then investigated. Electrochemistry studies revealed that 11 undergoes a two-electron reduction process in which the ligand remains bound to the metal. The synthesis of Pt(DIOP)(trans-stilbene) through the chemical and electrochemical reduction of 11 further demonstrated that DIOP remains bound to platinum after reduction of 11.
Book Synopsis Synthesis and Reactivity of Palladium and Platinum Complexes with a Hemilabile NNN Ligand by : Evan Lunt
Download or read book Synthesis and Reactivity of Palladium and Platinum Complexes with a Hemilabile NNN Ligand written by Evan Lunt and published by . This book was released on 2019 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Higher Oxidation State Organopalladium and Platinum Chemistry by : Allan J. Canty
Download or read book Higher Oxidation State Organopalladium and Platinum Chemistry written by Allan J. Canty and published by Springer. This book was released on 2011-02-25 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kyle A. Grice, Margaret L. Scheuermann and Karen I. Goldberg: Five-Coordinate Platinum(IV) Complexes.- Jay A. Labinger and John E. Bercaw: The Role of Higher Oxidation State Species in Platinum-Mediated C-H Bond Activation and Functionalization.- Joy M. Racowski and Melanie S. Sanford: Carbon-Heteroatom Bond-Forming Reductive Elimination from Palladium(IV) Complexes.- Helena C. Malinakova: Palladium(IV) Complexes as Intermediates in Catalytic and Stoichiometric Cascade Sequences Providing Complex Carbocycles and Heterocycles.- Allan J. Canty and Manab Sharma: h1-Alkynyl Chemistry for the Higher Oxidation States of Palladium and Platinum.- David C. Powers and Tobias Ritter: Palladium(III) in Synthesis and Catalysis.- Marc-Etienne Moret: Organometallic Platinum(II) and Palladium(II) Complexes as Donor Ligands for Lewis-Acidic d10 and s2 Centers.
Book Synopsis Synthesis, Characterization, and Reactivity of Mononuclear Palladium Complexes Bearing Nitrogen and Carbon-donor Ligands by : Nicholas Ruhs
Download or read book Synthesis, Characterization, and Reactivity of Mononuclear Palladium Complexes Bearing Nitrogen and Carbon-donor Ligands written by Nicholas Ruhs and published by . This book was released on 2017 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of Pd-catalyzed C--H functionalization reactions for chemical transformations has been widely studied over the last several decades. Much of the research to date has focused on conventional Pd0/II catalytic cycles. However, more recent studies have shown that many transformations can also follow a PdII/IV catalytic cycle. High-valent PdIII and PdIV species are often proposed to be important intermediates in such transformations. C--H coupling reactions involving high-valent intermediates often involve the oxidation of a PdII species to a PdIII or PdIV complex, which can then undergo subsequent C--heteroatom bond formation. However, the need for harsh oxidants and reaction conditions in many of these reactions hinders their practical applicability. The focus of this work is to study the properties and reactivity of PdII, PdIII, and PdIV complexes through modifications of the supporting macrocyclic ligands. Another goal of this work is to probe the ability of these complexes to facilitate C--H activation and C--heteroatom bond formation reactions using environmentally benign oxidants.Our lab reported the synthesis and characterization of the first organometallic mononuclear PdIII complexes stabilized by the tetradentate ligand N,N'-di-tert-butyl-2,11-diaza[3,3](2,6)pyridinophane (tBuN4). In order to further probe the Pd chemistry with this class of ligands, we prepared ligands with modifications to the steric bulk on the amine groups. In the first study detailed in chapter 2, the synthesis and characterization of PdII and PdIII complexes supported by N,N'-di-neo-pentyl-2,11-diaza[3,3](2,6)-pyridinophane(NpN4) and N,N'-di-benzyl-2,11-diaza[3,3](2,6)-pyridinophane(BzN4) is reported. Interestingly, the spectroscopic and crystallographic property of the newly synthesized complexes falls between the tBuN4 and MeN4 complexes. The C--C and C--heteroatom bond formation reactivity of the NpN4 and BzN4 supported complexes is also similar to our group's previously reported complexes.We also prepared and studied a series of Pd complexes bearing a modified tetradentate pyridinophane ligand, tBuN3CH. Essentially, we have replaced one of the nitrogen donor atoms from the N4 ligand with a carbon atom and have also introduced a new C--H bond. Due to its expected positioning near the metal center, this bond has the potential to undergo intramolecular C--H bond activation. In order to study the reactivity of this ligand, electronic modifications were made by substituting various electron-donating and withdrawing groups in the para position to this new C--H bond. In chapter 3, the synthesis and characterization of a series of PdII, PdIII, and PdIV complexes stabilized by the N3CH ligand is reported. Interestingly, a spectroscopic and crystallographic study of the pRN3CHPdII(OAc)2 complexes reveals that the Cipso--H bond remains unactivated at the PdII stage. However, upon oxidation to PdIII, the Cipso--H bond is activated.Interestingly, we discovered that the aerobic oxidation of the PdII complex [pRN3CHPdII(MeCN)](BF4) leads to the formation of the PdIII complex [pRN3CHPdIII(MeCN)](ClO4)2 at room temperature. Surprisingly, the C--H activation reaction proceeds in the presence of oxygen without the need for external base. Furthermore, the moderate rate of the reaction allowed us to investigate the mechanism of the reaction by utilizing kinetics and UV-Vis spectroscopy. Detailed mechanistic studies revealed that C--H activation of the Cipso--H bond is the rate determining step of the reaction.
Book Synopsis The Synthesis and Characterization of Bidentate Phosphine and Arsine Ligands and Their Complexes with Palladium (II) and Platinum (II) by : David Michael Anthony Minahan
Download or read book The Synthesis and Characterization of Bidentate Phosphine and Arsine Ligands and Their Complexes with Palladium (II) and Platinum (II) written by David Michael Anthony Minahan and published by . This book was released on 1982 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Platinum, Palladium and Rhodium Complexes of Α-aminophosphine Ligands by :
Download or read book Synthesis of Platinum, Palladium and Rhodium Complexes of Α-aminophosphine Ligands written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Platinum(II) Complexes with Adamantantanamine Derivatives and Related Ligands by : Monique Doyon
Download or read book Synthesis and Characterization of Platinum(II) Complexes with Adamantantanamine Derivatives and Related Ligands written by Monique Doyon and published by . This book was released on 1991 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: "New platinum(II) complexes of the type (Pt(A$ sp prime$)Cl$ sb3 rbrack sp-$, Pt(A)(A$ sp prime$)Cl$ sb2$ and Pt(A)(A$ sp prime$)I$ sb2$, where A = methylamine, ethylamine, cyclobutylamine and cyclopentylamine and A$ sp prime$ = 1-adamantanamine, 2-adamantanamine and 1-methyladamantanamine have been synthesized. The structure of (2-adamH) (Pt(EtNH$ sb2$)Cl$ sb3$) complex has been determined by X-ray diffraction." --
Book Synopsis Synthesis, Reactivity and Catalytic Applications of Palladium and Platinum Complexes Containing Rigid Bidentate Nitrogen Ligands by : Robert van Asselt
Download or read book Synthesis, Reactivity and Catalytic Applications of Palladium and Platinum Complexes Containing Rigid Bidentate Nitrogen Ligands written by Robert van Asselt and published by . This book was released on 1993 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis, Characterization, and Reactivity of Heterobimetallic Gold Cluster Complexes of Platinum and Palladium by : Larry Noboru Ito
Download or read book The Synthesis, Characterization, and Reactivity of Heterobimetallic Gold Cluster Complexes of Platinum and Palladium written by Larry Noboru Ito and published by . This book was released on 1990 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Luminescent Platinum(ii), Palladium(ii) and Gold(iii) Complexes Containing Isocyanide, Alkynyl and N-Heterocyclic Carbene Ligands by : Faan-Fung Hung
Download or read book Luminescent Platinum(ii), Palladium(ii) and Gold(iii) Complexes Containing Isocyanide, Alkynyl and N-Heterocyclic Carbene Ligands written by Faan-Fung Hung and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Luminescent Platinum(II), Palladium(II) and Gold(III) Complexes Containing Isocyanide, Alkynyl and N-heterocyclic Carbene Ligands: Synthesis, Photophysical Properties and Material Applications" by Faan-fung, Hung, 孔繁峰, 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: Several cyclometalated Pt(II) isocyanide complexes containing C-deprotonated C DEGREESN DEGREESC ligands (C DEGREESN DEGREESC = 2,6-diphenylpyridine derivatives) were synthesized. These complexes display orange-red emissions with max at 582-619 nm and quantum yields of up to 26% in CH2Cl2 at room temperature. The incorporation of carbazole/fluorene/thiophene unit(s) to C DEGREESN DEGREESC ligands leads to minimized structural distortion of complexes in their excited states and thereby suppresses non-radiative decay pathways. The high thermal stability (Td >300 C) renders these complexes good candidates as phosphorescent dopants in organic light-emitting diodes (OLEDs). Red-emitting OLEDs with CIE coordinates of (0.650.01, 0.350.01) were fabricated by vacuum deposition, showing a maximum external efficiency of 12%. In addition, well-defined nano/microstructures were obtained from self-assembly of these complexes driven by π∙∙∙π, C-H∙∙∙π and C-H∙∙∙H-C interactions as observed in the crystal structures. Two series of organopalladium(II) alkynyl complexes containing a terpy (terpy = 2,2':6',2''-terpyridine) or C DEGREESN DEGREESC pincer carbene ligand (C DEGREESN DEGREESC = 2,6-bis(1-butylimidazol-2-ylidenyl)pyridine) were prepared. These complexes are non-emissive in solution at room temperature except that the one containing both C DEGREESN DEGREESC and pyrenylacetylide ligands shows phosphorescence (Φ = 0.3%) originating from intraligand state of the acetylide ligand. This could be attributed to the strong -donating N-heterocyclic carbene (NHC) in the pincer ligand that strongly destabilizes d-d state, the population of which provides an efficient non-radiative decay channel. To make comparison between Pd(II) and Pt(II) complexes with the two ligand systems, Pt(II) C DEGREESN DEGREESC alkynyl complexes were also prepared. They are emissive in solution and some display excimer emissions at high concentration (〖10〗 DEGREES(-4)-〖10〗 DEGREES(-3) mol 〖10dm〗 DEGREES(-3)). The X-ray crystal structures of [Pd(L)(CCPh)](〖PF〗_6) (L = terpy and C DEGREESN DEGREESC) revealed one-dimensional chain stacking of complex cations with alternating Pd(II)∙∙∙Pd(II) contacts of about 3.29-3.35 A and π-π interactions of about 3.4 A . Well-defined submicron/nanostructures were obtained from self-assembly of Pd(II) and Pt(II) alkynyl complexes driven by π-π interactions between aromatic moieties and/or metal∙∙∙metal interactions. DFT calculations on the optimized structures of [M(L)(CCPh)]+ (M = Pd(II) and Pt(II)) revealed the existence of metal∙∙∙metal closed-shell interactions. In addition, the complex containing the C DEGREESN DEGREESC ligand exhibits slightly enhanced metal∙∙∙metal interactions and larger "bonding" energy upon dimerization. Furthermore, spin-orbit coupling between singlet and triplet excited states is more effective which promotes rapid intersystem crossing. A new class of cyclometalated Au(III) complexes containing C-deprotonated C DEGREESN ligands (C DEGREESN = 2-phenylpyridine and its derivatives) and cis-chelating bis-NHC ligands was synthesized. These are the first examples of Au(III) complexes supported by cis-chelating bis-NHC ligands. They display emissions in solution under degassed condition at room temperature with &
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