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Book Synthesis Characterization and Reactivity of Mononuclear Palladium Complexes Bearing Nitrogen and Carbon donor Ligands

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 Synthesis and Characterization of Palladium II Complexes of Phenothiazines

Download or read book Synthesis and Characterization of Palladium II Complexes of Phenothiazines written by Ravindra K. Vallabhaneni and published by . This book was released on 1994 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Characterization of Palladium Complexes of Quinones

Download or read book Synthesis and Characterization of Palladium Complexes of Quinones written by Glenn Alan Fox and published by . This book was released on 1988 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Chemical Synthesis and Characterization of Aniline Based Palladium Composites and Complexes

Download or read book Chemical Synthesis and Characterization of Aniline Based Palladium Composites and Complexes written by Jade Lorrayne Morgan and published by . This book was released on 2008 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Characterization of Novel Palladium and Platinum Phosphanylhydrazine Complexes and Their Potential Use as Catalysts

Download or read book Synthesis and Characterization of Novel Palladium and Platinum Phosphanylhydrazine Complexes and Their Potential Use as Catalysts written by Douglas J. Schaffer and published by . This book was released on 2009 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Characterization of Palladium Complexes of New Chugaev type Dicarbene Ligands and Their Application as Precatalysts in Suzuki Miyaura Cross coupling Reactions

Download or read book Synthesis and Characterization of Palladium Complexes of New Chugaev type Dicarbene Ligands and Their Application as Precatalysts in Suzuki Miyaura Cross coupling Reactions written by Adriana I. Moncada and published by . This book was released on 2005 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Characterization of Bimetallic Palladium and Platinum Complexes Resulting from Chelating Tertiary secondary Diphosphine Ligands

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 Synthesis Characterization and Electrochemical Properties of New Ferrocenylimine and Adamantylimine Palladium II Complexes and Their Application in Mizoroki Heck and Sukuzi Miyaura Carbon Carbon Cross coupling Reactions

Download or read book Synthesis Characterization and Electrochemical Properties of New Ferrocenylimine and Adamantylimine Palladium II Complexes and Their Application in Mizoroki Heck and Sukuzi Miyaura Carbon Carbon Cross coupling Reactions written by Asanda Cleopatra Matsheku and published by . This book was released on 2018 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Synthesis and Characterization of Bidentate Phosphine and Arsine Ligands and Their Complexes with Palladium II and Platinum II

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 Synthesis Characterization and Reactivity of Palladium Amido and Nitrene Complexes

Download or read book Synthesis Characterization and Reactivity of Palladium Amido and Nitrene Complexes written by Lawrence A. Jr Villanueva and published by . This book was released on 1993 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: