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Book Cationic Pentacoordinated Complexes of Copper II and Cobalt II with Mixed Ligands

Download or read book Cationic Pentacoordinated Complexes of Copper II and Cobalt II with Mixed Ligands written by Ronald Frank Van de Water and published by . This book was released on 1979 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book An Investigation of the Distorted Geometries of Copper II Nickel II and Cobalt II Complexes Induced by 1 3 Bis pyridylimino isoindoline Derivatives

Download or read book An Investigation of the Distorted Geometries of Copper II Nickel II and Cobalt II Complexes Induced by 1 3 Bis pyridylimino isoindoline Derivatives written by Amanda Courtney Robinson and published by . This book was released on 2019 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomimetic properties of copper, nickel, and cobalt coordination compounds have been studied extensively as these metals are found in the active sites of numerous proteins. Coordinating ligands with nitrogen donor atoms are especially of interest because nitrogen is also extremely common at these active sites. By changing the structure of the ligand, the complexes can be modified to mimic a wide array of enzymes. Studying these complexes has led researchers to propose mechanisms for many enzymes. In this work, tridentate ligands with nitrogen donor atoms were complexed with Cu(II), Ni(II), and Co(II) to form tetracoordinate and pentacoordinate systems. Syntheses and characterizations will be presented including X-ray crystallographic data, electron spin resonance, and electronic absorption data. [phi]t, [omega], and [tau] parameters will be given to describe the distorted geometries of the metal-ligand complexes.

Book Cobalt III Copper II and Nicker II Coordination Compounds as Cations in Polyborate Chemistry

Download or read book Cobalt III Copper II and Nicker II Coordination Compounds as Cations in Polyborate Chemistry written by Mohammed Abdulredha Altahan and published by . This book was released on 2017 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the synthesis and characterization of a number of polyborate compounds containing transition metal complex cations; most of these compounds contain 6-membered B3O3 boroxole rings within their structures.A total of twenty-six transition metal complex polyborate salts are reported: one contains the triborate monoanion, [B3O3(OH)4]-, three contain the tetraborate dianion [B4O5(OH)4]2-, twelve contain the pentaborate anion, [B5O6(OH)4]-, three contain the hexaborate dianion, [B6O7(OH)6]2- and five contain heptaborate anions (three of which are [B7O9(OH)5]2-, and two are [B7O9(OH)6]3-). Additionally, two compounds contain two isolated polyborate anion species (octaborate dianion [B8O10(OH)6]2- with pentaborate anion [B5O6(OH)4]-, and triborate anion [B3O3(OH)4]- with [B5O6(OH)4]-). The crystal structures of fifteen salts containing these polyborate anions are reported: [Co(en)3][B5O6(OH)4][B8O10(OH)6]∙5H2O (6), [Co(NH3)6]2[B4O5(OH)4]3∙11H2O (9), s-fac-[Co(dien)2][B7O9(OH)6]∙9H2O (11), [Co(diNOsar)]2[B3O3(OH)4]Cl5∙4.75H2O (12), [Cu(en)2][B5O6(OH)4]2∙2H2O (20), [Cu(pn)2{B5O6(OH)4}][B5O6(OH)4]∙4H2O (22), [Cu(TMEDA){B6O7(OH)6}]∙6H2O (23), [Cu(dac)2(H2O)2][Cu(dac)2][B7O9(OH)5]2∙4H2O (24), [Cu(N,N-dmen)2(H2O)][B5O6(OH)4]2·3H2O (27), [Cu(N,N-dmen){B6O7(OH)6}]·4H2O (28), [Ni(en){B6O7(OH)6}(H2O)2]∙H2O (37), [Ni(AEN)][B5O6(OH)4]∙H2O (38), [Ni(dac)2(H2O-)2][Ni(dac)2][B7O9(OH)5]2∙4H2O (39), [Ni(hn)2][B5O6(OH)4]2 (40), and s-fac-[Ni(dien)2][B5O6(OH)4]2 (41). All the synthesized compounds reported were characterized using spectroscopic (IR, multi-element NMR) and analytical (melting point, elemental analysis, magnetic susceptibility, thermal analysis, powder X-ray diffraction) techniques.The solid-state structures of transition metal complex polyborate salts all display multiple cation-anion H-bond interactions and these undoubtedly play a major role in the energetics of engineering these structures. For example, in compound [Co(NH3)6]2[B4O5(OH)4]3∙11H2O (9), fourteen of the 18 amino hydrogen atoms of the [Co(NH3)6]3+ cation are involved in secondary coordination to anions via H-bonds.Two unique polyborate anions, [B8O10(OH)6)]2- and [B7O9(OH)6]3- have been prepared and characterized in [Co(en)3][B5O6(OH)4][B8O10(OH)6]∙5H2O (6) and s-fac-[Co(dien)2][B7O9(OH)6]∙9H2O (11), respectively.viiThe reaction of transition metal complex cations with boric acid in different ratiosproduced polyborate compounds with different polyborate anions e.g. reaction of [Cu(en)2]2+with boric acid in 1:10 and 1:5 ratios produce polyborate compounds with pentaborate(1-) andtetraborate(2-) anions, respectively.New polyborate anion structural architectures are identified in this thesis: (i) thepentaborate(1-) anion in [Cu(pn)2{B5O6(OH)4}][B5O6(OH)4]∙4H2O (22) acts as a monodentateligand coordinated to the Cu(II) cation, (ii) the hexaborate(2-) anion in[Cu(TMEDA){B6O7(OH)6}]∙6H2O (23) and [Cu(N,N-dmen){B6O7(OH)6}]·4H2O (28)coordinates as a tridentate ligand with the Cu(II) cations, and (iii) the hexaborate(2-) anion in[Ni(en){B6O7(OH)6}(H2O)2]∙H2O (37) coordinates as a bidentate ligand with the Ni(II) cation.This is the first time that such coordination mode (i) and (iii) have been observed.

Book Cobalt II Nickel II and Copper II Complexes of Pentadentate Schiff Base Ligands

Download or read book Cobalt II Nickel II and Copper II Complexes of Pentadentate Schiff Base Ligands written by Lawrence Jack Willis and published by . This book was released on 1977 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Cobalt III Copper II and Nickel II Coordination Compounds as Cations in Polyborate Chemistry

Download or read book Cobalt III Copper II and Nickel II Coordination Compounds as Cations in Polyborate Chemistry written by Mohammed Abdulredha Altahan and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Characterization of Cobalt II Nickel II and Copper II Complexes with 3 3 bis p X benzoylacetoneiminato bis trimethylene amine Ligands

Download or read book Synthesis and Characterization of Cobalt II Nickel II and Copper II Complexes with 3 3 bis p X benzoylacetoneiminato bis trimethylene amine Ligands written by Yu-Ying Chen and published by . This book was released on 1979 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Copper II and Cobalt II Complexes Based on Methyl Trifluorosalicylate and Bipyridine Type Ligands

Download or read book Copper II and Cobalt II Complexes Based on Methyl Trifluorosalicylate and Bipyridine Type Ligands written by Evgeny V. Shchegolkov and published by . This book was released on 2020 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis of bis(salicylato)Cu(II) and Co(II) chelates based on methyl trifluorosalicylate and the corresponding M(OAc) 2 in the presence of alkali is reported. The following reaction with 2,2'-bipyridine and 1,10 phenanthroline in refluxing methanol affords heteroligand complexes containing methyl trifluorosalicylate and azaheterocyclic ligands in the ratio 2:1. However, the refluxing of Co(II) chelates in ethanol resulted in transesterification of methyl ester group to form heteroligand complexes of ethyl trifluorosalicylate while Cu(II) chelates underwent hydrolysis of ester group to obtain heteroligand complexes of trifluorosalicylic acid. The structures of obtained metal complexes were confirmed by X-Ray diffraction experiment, IR spectroscopy and elemental analysis. The antimycotic and antibacterial activities of synthesized metal complexes were investigated. The heteroligand metal complexes were found to exhibit moderate anti-Candida albicans activity. Among new series of complexes, the most activity showed the mixed metal complexes of trifluorosalicylates and 1,10-phenanthroline revealing a wide range of action in relation to pathogenic fungi and bacteria.

Book An Investigation of Nickel II Copper II and Cobalt II Complexes Employing Bidentate Ligands Derived from 2 beta ketoalkyl heteroaromatic Compounds

Download or read book An Investigation of Nickel II Copper II and Cobalt II Complexes Employing Bidentate Ligands Derived from 2 beta ketoalkyl heteroaromatic Compounds written by Robert Paul Cassity and published by . This book was released on 1976 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: