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Author: Kamruz MD. Zaman Publisher: ISBN: Category : Thiocyanates Languages : en Pages : 188
Book Description
A number of vanadium(IV) thiocyanate and cyanate complexes have been prepared and characterized by elemental analysis, single crystal X-ray diffraction, thermogravimetric analysis and magnetic susceptibility measurements as appropriate. A variety of organic ligands including imidazole, pyrazole, pyrazine, methylpyrazine, 2,5-dimethylpyrazine, 1,10-phenanthroline and 2,2'-bipyridine were used in the study. The structures of VO(H20)(pzH)2(NCS)2 and V(OH)2(H2O)2(NCS)2·3(Me2pyz) have been established by X-ray crystallography. Both complexes are six-coordinate with VO(H20)(pzH)2(NCS)2 having a tetragonally distorted structure and V(OH)2(H2O)2(NCS)2·3(Me2pyz) slightly distorted octahedral structure. A vanadium(IV) sulfate complex, VO(pzH)4(SO4)·H2O, has also been prepared as a potential prescursor to vanadium(IV) thiocyanate complexes. A six coordinate structure has been proposed for it. The other complexes prepared were characterized primarily by infrared spectroscopy.
Author: Kamruz MD. Zaman Publisher: ISBN: Category : Thiocyanates Languages : en Pages : 188
Book Description
A number of vanadium(IV) thiocyanate and cyanate complexes have been prepared and characterized by elemental analysis, single crystal X-ray diffraction, thermogravimetric analysis and magnetic susceptibility measurements as appropriate. A variety of organic ligands including imidazole, pyrazole, pyrazine, methylpyrazine, 2,5-dimethylpyrazine, 1,10-phenanthroline and 2,2'-bipyridine were used in the study. The structures of VO(H20)(pzH)2(NCS)2 and V(OH)2(H2O)2(NCS)2·3(Me2pyz) have been established by X-ray crystallography. Both complexes are six-coordinate with VO(H20)(pzH)2(NCS)2 having a tetragonally distorted structure and V(OH)2(H2O)2(NCS)2·3(Me2pyz) slightly distorted octahedral structure. A vanadium(IV) sulfate complex, VO(pzH)4(SO4)·H2O, has also been prepared as a potential prescursor to vanadium(IV) thiocyanate complexes. A six coordinate structure has been proposed for it. The other complexes prepared were characterized primarily by infrared spectroscopy.
Author: Xiao Wu Publisher: ISBN: 9780438888753 Category : Languages : en Pages : 120
Book Description
Cyclopentadienyltris (dibutyl phosphito-P) cobaltate, {(C5H5)Co[(OR)2PO]3}– (R=Bu), is a tripodal ligand and also called Kläui ligand (R=Bu). The synthesis and characterization of several vanadium(III) and vanadium(IV) complexes containing Kläui ligand (R=Bu) as the catalytic models to catalyst the oxidation reaction of 3,5-di-tert-butylcatechol (3,5-DTBC) to 3,5-di-tert-butyl-o-benzoquinone (3,5-DTBQ) are detailed here. Chapter II details the synthesis of the supersandwiches and Kläui ligand (R=Bu). Chapter III details the synthesis of vanadium monomeric complexes containing Kläui ligand (R=Bu). Chapter IV details the vanadium dimeric bridging complexes synthesized by different vanadium monomers from Chapter III. Chapter V details the catalytic activities of these vanadium complexes.
Author: Michael L. Tarlton Publisher: ISBN: 9781321475692 Category : Languages : en Pages : 90
Book Description
A series of vanadium(IV) dimers have been synthesized that bear bridging phosph(on/in)ate ligands with varying substituents, and terminal methoxy and ethoxy KlaA¼i ligands [CpPOR,ORCo] --, R=Me, Et, resulting in two VO6 centers per complex. The complexes have been widely characterized, employing techniques such as spectroscopy, X-ray diffraction, and electrochemical analysis. The oxidative catalytic activity of each complex on the oxidation of 3,5-di-tert -butylcatechol to 3,5-di-tert-butyl-o-benzoquinone under aerobic conditions is presented herein.
Author: Kamruz MD. Zaman
Author: Kamruz MD. Zaman
Author: Xiao Wu
Author: Marlene Anne Natamihardja
Author: Joe R. Rambo
Author: Michael L. Tarlton
Author: Dale E. Wheeler
Author: Paula Joan Bosserman
Author: Norman S. Dean
Author: Eddia Plume Copeland
Author: Wolf Christian Alexander Wilisch