scholarly journals SYNTHESIS OF MIXED LIGAND METAL COMPLEX OF CU (II) WITH SCHIFF BASE AND THIOACETAMIDE

2020 ◽  
Vol 4 (12) ◽  
pp. 24-26
Author(s):  
Pratibha Namdeo ◽  
Arpan Bhardwaj ◽  
S.K. Verma
Keyword(s):  
Schiff Base ◽  
Coordination Chemistry ◽  
Metal Complex ◽  
19Th Century ◽  
Metal Ion ◽  
Cobalt Chloride ◽  
Complex Compounds ◽  
Mixed Ligand ◽  
The 19Th Century ◽  
Alfred Werner

Complex compounds were identified in the 19th century. The formation of hexammine cobalt(III) chloride [CO (NH3)6] Cl3 which is prepared from cobalt chloride and ammonia is thefirst compound, studied and real beginning of coordination Chemistry [1]. Alfred Werner firstexplained the nature of bonding and structure of these complexes and he was awarded NoblePrize in 1913 [2]. He gave the concept of primary (ionisable) valency and secondary(unionsible) valencies of metal ion.

Synthesis, Characterization and Emission Properties of a Mixed Metal Complex of Europium (III) and Terbium (III) with a Tripodal Heptadentate Schiff Base Ligand

2012 ◽  
Vol 463-464 ◽  
pp. 326-330
Author(s):  
Masatoshi Kanesato ◽  
Keiko Nagahara ◽  
Midori Goto
Keyword(s):  
Schiff Base ◽  
Metal Complex ◽  
Schiff Base Ligand ◽  
Metal Ion ◽  
Uv Light ◽  
Green Emission ◽  
Crystal Structure Analysis ◽  
Mixed Metal ◽  
X Ray Crystallography

The preparation and characterization of a novel mixed metal complex of europium (III) and terbium (III) of a tripodal heptadentate Schiff-base ligand N [CH2CH2N=CH (2-OH-3-MeC6H3)]3 (H3L1) have been studied. The complex was prepared by the reaction of [EuL1] and [TbL1] in N, N-dimethylformamide. The ratio of europium (III) to terbium (III) in the mixed metal complex was found to be 3 to 7. The molecular structure of [Eu0.3Tb0.7L1] was determined by X-ray crystallography. The crystal structure analysis revealed that the Schiff-base behaves as a tri-deprotonated heptadentate ligand encapsulating the each metal ion within the N4O3 cavity. Under the excitation of UV light, the solid state of the complex exhibited red emission corresponding to europium (III) ion. The emission bands of 5D0 → 7Fj (j = 2, 3, 4) were observed at 609, 652, and 706 nm, respectively. On the other hand, the green emission corresponding to terbium (III) ion was not observed.

scholarly journals 100 years of metal coordination chemistry: from Alfred Werner to anticancer metallodrugs

2014 ◽  
Vol 86 (12) ◽  
pp. 1897-1910 ◽  
Author(s):  
Nicolas P. E. Barry ◽  
Peter J. Sadler
Keyword(s):  
Coordination Chemistry ◽  
Metal Complexes ◽  
Oxidation State ◽  
Metal Ion ◽  
Outer Sphere ◽  
Metal Coordination ◽  
Substitution Reactions ◽  
Diagnostic Agents ◽  
New Thinking ◽  
Alfred Werner

Abstract Alfred Werner was awarded the Nobel Prize in Chemistry just over 100 years ago. We recall briefly the era in which he was working, his co-workers, and the equipment he used in his laboratories. His ideas were ground breaking: not only does a metal ion have a primary valency (“hauptvalenz”, now the oxidation state), but also a secondary valency, the coordination number (“nebenvalenz”). At that time some refused to accept this idea, but he realised that his new thinking would open up new areas of research. Indeed it did. We illustrate this for the emerging field of medicinal metal coordination chemistry, the design of metal-based therapeutic and diagnostic agents. The biological activity of metal complexes depends intimately not only on the metal and its oxidation state, but also on the type and number of coordinated ligands, and the coordination geometry. This provides a rich platform in pharmacological space for structural and electronic diversity. It is necessary to control both the thermodynamics (strengths of metal-ligand bonds) and kinetics of ligand substitution reactions to provide complexes with defined mechanisms of action. Outer-sphere interactions can also play a major role in target recognition. Our current interest is focussed especially on relatively inert metal complexes which were very familiar to Werner (RuII, OsII, RhIII, IrIII, PtII, PtIV).

Grammatical Descriptions in Manchu Grammar Books from the Qing Dynasty

2019 ◽  
Vol 41 (1) ◽  
pp. 39-55
Author(s):  
Takashi Takekoshi
Keyword(s):  
19Th Century ◽  
Qing Dynasty ◽  
The Qing Dynasty ◽  
Chinese Scholars ◽  
High Degree ◽  
The 19Th Century

In this paper, we analyse features of the grammatical descriptions in Manchu grammar books from the Qing Dynasty. Manchu grammar books exemplify how Chinese scholars gave Chinese names to grammatical concepts in Manchu such as case, conjugation, and derivation which exist in agglutinating languages but not in isolating languages. A thorough examination reveals that Chinese scholarly understanding of Manchu grammar at the time had attained a high degree of sophistication. We conclude that the reason they did not apply modern grammatical concepts until the end of the 19th century was not a lack of ability but because the object of their grammatical descriptions was Chinese, a typical isolating language.

Immigrant Arab Women in Chile during the Renaissance (Nahda), 1910s-1920s

1970 ◽  
pp. 47-55
Author(s):  
Sarah Limorté
Keyword(s):  
20Th Century ◽  
19Th Century ◽  
Thematic Analysis ◽  
New World ◽  
Arab Women ◽  
Arab Woman ◽  
The Subject ◽  
The 19Th Century

Levantine immigration to Chile started during the last quarter of the 19th century. This immigration, almost exclusively male at the outset, changed at the beginning of the 20th century when women started following their fathers, brothers, and husbands to the New World. Defining the role and status of the Arab woman within her community in Chile has never before been tackled in a detailed study. This article attempts to broach the subject by looking at Arabic newspapers published in Chile between 1912 and the end of the 1920s. A thematic analysis of articles dealing with the question of women or written by women, appearing in publications such as Al-Murshid, Asch-Schabibat, Al-Watan, and Oriente, will be discussed.

THE IDEA OF «COMMUNITY» IN THE GOVERNMENT CONCEPTS OF GALICIA OF THE XIX – BEGINNING OF THE XX CENTURY

2019 ◽  
pp. 15-21
Author(s):  
Liubomyr Ilyn
Keyword(s):  
Nineteenth Century ◽  
19Th Century ◽  
Practical Significance ◽  
Distinctive Features ◽  
Legal Studies ◽  
Legal Principle ◽  
General Scientific ◽  
The Government ◽  
The Right ◽  
The 19Th Century

Purpose. The purpose of the article is to analyze and systematize the views of social and political thinkers of Galicia in the 19th - beginning of the 20th centuries. on the right and manner of organizing a nation-state as a cathedral. Method. The methodology includes a set of general scientific, special legal, special historical and philosophical methods of scientific knowledge, as well as the principles of objectivity, historicism, systematic and comprehensive. The problem-chronological approach made it possible to identify the main stages of the evolution of the content of the idea of catholicity in Galicia's legal thought of the 19th century. Results. It is established that the idea of catholicity, which was borrowed from church terminology, during the nineteenth century. acquired clear legal and philosophical features that turned it into an effective principle of achieving state unity and integrity. For the Ukrainian statesmen of the 19th century. the idea of catholicity became fundamental in view of the separation of Ukrainians between the Russian and Austro-Hungarian empires. The idea of unity of Ukrainians of Galicia and the Dnieper region, formulated for the first time by the members of the Russian Trinity, underwent a long evolution and received theoretical reflection in the work of Bachynsky's «Ukraine irredenta». It is established that catholicity should be understood as a legal principle, according to which decisions are made in dialogue, by consensus, and thus able to satisfy the absolute majority of citizens of the state. For Galician Ukrainians, the principle of unity in the nineteenth century. implemented through the prism of «state» and «international» approaches. Scientific novelty. The main stages of formation and development of the idea of catholicity in the views of social and political figures of Halychyna of the XIX – beginning of the XX centuries are highlighted in the work. and highlighting the distinctive features of «national statehood» that they promoted and understood as possible in the process of unification of Ukrainian lands into one state. Practical significance. The results of the study can be used in further historical and legal studies, preparation of special courses.

Book reviews

2017 ◽  
Vol 5 (2) ◽  
pp. 215-226
Author(s):  
Kurdish Studies
Keyword(s):  
19Th Century ◽  
Spatial Control ◽  
Cornell University ◽  
South Eastern ◽  
Turkish State ◽  
The 19Th Century

Andrea Fischer-Tahir and Sophie Wagenhofer (edsF), Disciplinary Spaces: Spatial Control, Forced Assimilation and Narratives of Progress since the 19th Century, Bielefeld: Transcript Verlag, 2017, 300 pp., (ISBN: 978-3-8376-3487-7).Ayşegül Aydın and Cem Emrence, Zones of Rebellion: Kurdish Insurgents and the Turkish State, Ithaca and London: Cornell University Press, 2015, 192 pp., (ISBN: 978-0-801-45354-0).Evgenia I. Vasil’eva, Yugo-Vostochniy Kurdistan v XVI-XIX vv. Istochnik po Istorii Kurdskikh Emiratov Ardelan i Baban. [South-Eastern Kurdistan in the XVI-XIXth cc. A Source for the Study of Kurdish Emirates of Ardalān and Bābān], St Petersburg: Nestor-Istoria, 2016. 176 pp., (ISBN 978-5-4469-0775-5).Karin Mlodoch, The Limits of Trauma Discourse: Women Anfal Survivors in Kurdistan-Iraq, Berlin: Klaus Schwarz Verlag, 2014, 541 pp., (ISBN: 978-3-87997-719-2). 

Calisthenics and bodyweight exercises: different concepts or scientific synonyms?

2020 ◽  
Vol 19 (1) ◽  
pp. 13
Author(s):  
Leury Max Da Silva Chaves ◽  
Gabriel Vinicius Santos ◽  
Cauê La Scala Teixeira ◽  
Marzo Edir Da Silva-Grigoletto
Keyword(s):  
Body Weight ◽  
19Th Century ◽  
Scientific Literature ◽  
Cost Benefit ◽  
Training Method ◽  
Benefit Ratio ◽  
Cost Benefit Ratio ◽  
The 19Th Century

 Bodyweight exercises (also popularly known as calisthenics) is a classic training method and its practice has been widespread since the 19th century, but little evidenced in the scientific literature over the years. This type of training aims to promote multi-system adaptations using body weight as an overload with no or few implements [1–3]. This characteristic makes exercise with body weight easy to apply, in addition to having an excellent cost-benefit ratio when compared to other training possibilities that require machines or materials [4,5].

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