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Book Synthesis Characterization and Reactivity of Molybdenum and Tungsten Imido Complexes of Relevance to Alkene Dimerization

Download or read book Synthesis Characterization and Reactivity of Molybdenum and Tungsten Imido Complexes of Relevance to Alkene Dimerization written by William R. H. Wright and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Characterization and Catalytic Activity of Molybdenum VI Di and Monooxo Aryloxides

Download or read book Synthesis Characterization and Catalytic Activity of Molybdenum VI Di and Monooxo Aryloxides written by Mauricio Quiroz-Guzmán and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of molybdenum is immensely rich and diverse. Molybdenum is essential for life, and has many applications in industry. The first chapter offers a general perspective of the chemistry of molybdenum in high oxidation states dominated by diverse oxo species, such as the MoO22+ and MoO4+ units that are focus of my research. I describe the importance of MoO22+ complexes as models for the active sites of oxo transfer molybdoenzymes (e.g. DMSO oxidase) and for industrial heterogeneous transformation such as the SOHIO process (one of our ultimate goals). I also outline the importance of MoO4+ complexes as procatalysts for metathesis polymerization and as models of deoxygenated active sites of MoO22+ oxygen catalysts that have triggered our interest. The second chapter introduces the synthesis and full characterization of 4-, 5- and 6-coordinated MoO2(OAr)2L0-1 complexes with bulky aryloxide ligands, starting from the MoO2Cl2 or MoO2Cl2(DMF)2 precursors. Steric and electronic modifications in the aryloxide moieties were performed in order to understand their effect in the final structure and yields of the synthesized complexes. The nature and mechanism of formation of the radical species detected in their synthesis is proposed. The third chapter presents the facile synthesis of varios MoO(OAr)4-nCln complexes starting from the MoO2Cl2 precursor. Their mechanism of formation is proposed and the supporting evidence for this new reaction is provided. Steric and electronic modifications in the aryloxide moieties were used to study their structural and electronic effects in the MoO4+ complexes. The fourth chapter outlines the synthesis of Mo(VI) monooxo bisphenoxides with a characteristic cis-chloro cis-bisphoxide arrangement around the MoO4+ unit. Electronic and steric modifications in the bisphenoxide rings were done to determine their effect in the structure and reactivity of the final complexes. The fifth chapter introduces the application of the synthesized MoO(OAr)4-nCln and MoO(bisphenoxides)2Cl2 complexes as procatalysts for olefin metathesis polymerization of norbornene. The correlation between structure and reactivity of the procatalyst is discussed.

Book New Molybdenum Compounds

Download or read book New Molybdenum Compounds written by Kenneth John Wiesinger and published by . This book was released on 1991 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Characterizations and Reactions of Low Valent Complexes of Molybdenum Containing Bis 2 diphenylphosphinoethyl phenyl phosphine and a Nitrogen Fixation Approach

Download or read book Synthesis Characterizations and Reactions of Low Valent Complexes of Molybdenum Containing Bis 2 diphenylphosphinoethyl phenyl phosphine and a Nitrogen Fixation Approach written by Hassan H. Hammud and published by . This book was released on 1994 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Chiral Molybdenum and Tungsten Imido Alkylidene Complexes as Catalysts for Asymmetric Ring closing Metathesis ARCM

Download or read book Chiral Molybdenum and Tungsten Imido Alkylidene Complexes as Catalysts for Asymmetric Ring closing Metathesis ARCM written by John Bryson Alexander and published by . This book was released on 1999 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Chemical and Structural Characterization of Complexes of Molybdenum with Sulfur and Nitrogen Containing Ligands

Download or read book Synthesis Chemical and Structural Characterization of Complexes of Molybdenum with Sulfur and Nitrogen Containing Ligands written by Jeffrey Hyde (R.) and published by . This book was released on 1981 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Attempted Synthesis and Characterization of Some Molybdenum V VI Complexes

Download or read book Attempted Synthesis and Characterization of Some Molybdenum V VI Complexes written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Reactivity of Molybdenum Organometallic Complexes Supported by Amide Ligands

Download or read book Synthesis and Reactivity of Molybdenum Organometallic Complexes Supported by Amide Ligands written by Adam Scott Hock and published by . This book was released on 2007 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) Chapter 4. Reactivity of Molybdenum Imido Alkylidene Bis(pyrrolyl) Complexes. The Lewis amphoteric nature of the bis(pyrrolyl) complexes reported in chapter 3 is examined by demonstrating that these complexes react with both trimethylphosphine (at the molybdenum center) and B(C6Fs)3 (at a q5 pyrrolyl nitrogen). A structure of a trimethylphosphine adduct is reported. The bis(pyrrolyl) complexes are found to serve as excellent precursors for the in situ generation of olefin metathesis catalysts at room temperature and millimolar concentration. Furthermore, catalysts not accessible via traditional routes may now be accessed from bis(pyrrolyl) precursors. The bis(pyrrolyl) complexes also react with simple olefins such as ethylene and isobutylene to yield what are proposed to be a bimetallic dimer [Mo(NAr)(NC4H4)2]2 and a 2-propylidene complex via olefin metathesis. The impact of in situ synthesis on syn and anti isomer ratios is discussed as is reactivity with protic reagents other than alcohols.

Book Synthesis Characterization and Catalytic Studies of Molybdenum Thiolate Complexes and Copper Complexes with Substituted NS2 macrocyclic Ligands

Download or read book Synthesis Characterization and Catalytic Studies of Molybdenum Thiolate Complexes and Copper Complexes with Substituted NS2 macrocyclic Ligands written by Antony Alex Tipton and published by . This book was released on 1999 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Characterization and Hydrogenolysis of Substituted and Unsubstituted Alkyldiazenido Complexes of Molybdenum

Download or read book Synthesis Characterization and Hydrogenolysis of Substituted and Unsubstituted Alkyldiazenido Complexes of Molybdenum written by David C. Busby and published by . This book was released on 1978 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: