Author: Carlos Gilberto Ortiz VazquezPublisher:
ISBN:
Category :
Languages : en
Pages : 526
Book Description
Synthesis, Structure, and Reactivity of Diamide-supported Molybdenum Complexes
Author: Carlos Gilberto Ortiz VazquezPublisher:
ISBN:
Category :
Languages : en
Pages : 526
Book Description
Synthesis and Reactivity of Molybdenum Organometallic Complexes Supported by Amide Ligands
Author: Adam Scott HockPublisher:
ISBN:
Category :
Languages : en
Pages : 292
Book Description
(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.
Synthesis, Structure and Reactivity of Binary Molybdenum-sulfur Complexes
Author: Mark Edward DraganjacPublisher:
ISBN:
Category : Catalysis
Languages : en
Pages : 438
Book Description
The Synthesis, Structure and Reactivity of Cyclootadienyl Complexes of Molybdenum and Tungsten
Author: Dale Martin SpencerSynthesis, Characterization and Catalytic Activity of Molybdenum(VI) Di- and Monooxo Aryloxides
Author: Mauricio Quiroz-GuzmánPublisher:
ISBN:
Category : Molybdenum
Languages : en
Pages :
Book Description
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.
Synthesis, Structure, and Applications of Metallacyclic Alkylidene Complexes of Molybdenum and Tungsten
Author: Kapil Shyam LokarePublisher:
ISBN:
Category : Alkenes
Languages : en
Pages : 308
Book Description
Synthesis, Reactivity and Electronic Structure of Molybdenum and Tungsten Complexes
Author: Kristine QuinlanPublisher: Ann Arbor, Mich. : University Microfilms International
ISBN:
Category :
Languages : en
Pages : 378
Book Description
Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 886
Book Description
Synthesis and Reactivity of Some Molybdenum(VI) Alkylidene and Alkylidyne Complexes
Author: John Stephen MurdzekPublisher:
ISBN:
Category :
Languages : en
Pages : 1082
Book Description
Synthesis, Chemical and Structural Characterization of Molybdenum -hydrazido (2- ) Complexes with Tridentate Thiolate Ligands
Author: Lisa M. ThroopPublisher:
ISBN:
Category : Molybdenum compounds
Languages : en
Pages : 80
Book Description