نتایج جستجو برای: coordination compounds

تعداد نتایج: 301536  

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2007

Journal: :Odesa National University Herald. Chemistry 2017

Journal: :Записки Горного Института 2020

2013

Coordination chemistry is a challenging field in inorganic chemistry and has evolved as an important subject area in current research activities. Coordination compounds have been known for well over a century and the scientific interest in these compounds increased dramatically. The field of coordination chemistry has been widely explored. The recent surge in the popularity of coordination comp...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان زنجان - دانشکده علوم پایه 1389

دو پلیمر کویوردیناسیونی سرب(ii) جدید از مالئیک اسید و فوماریک اسید، [pb(µ7-mal)]n (1) و [pb(µ6-fum)]n (2) از طریق روش سونوشیمی سنتز و با میکروسکوپ الکترونی روبشی، پراش اشعه x و طیف سنجی ir شناسایی شده اند. رفتار گرمایی نمونه های نانو و توده ترکیبات 1 و 2 مطالعه و با یکدیگر مقایسه شدند. ترکیب 1 به وسیله بلورنگاری اشعه x از نظر ساختاری شناسایی شد. اثر حلال بر روی اندازه و ریخت شناسی نانوساختار تر...

2007
B. L. Khandelwal

Introduction Atomic Structures and Properties Electronic configurations Radii of atoms and ions Ionisation enthalpies Oxidation states Compound formation in maximum oxidation states Stability of compounds in aqueous solution Magnetic properties Coloured ion formation Alloy formation Interstitial compound formation Coordination Compounds Types of ligands Homleptic and heteroleptic complexes Coor...

Journal: :journal of the iranian chemical research 0
muhammed basheer ummathur department of chemistry, kahm unity women’s college, manjeri, kerala-676122, india anjali krishnan department of chemistry, kahm unity women’s college, manjeri, kerala-676122, india perumpalli ummer department of chemistry, university of calicut, kerala-673635, india

the coupling of tetrazotised 1,8-diaminonaphthalene with 1,3-dicarbonyl compounds [acetylacetone,methylacetoacetate and acetoacetanilide] yielded a new series of tetradentate ligand systems. analytical, ir,1h nmr and mass spectral data indicate that the compounds exist in the intramolecularly hydrogen bondeddihydrazone form. dibasic tetradentate n2o2 coordination of these compounds in their [ml...

2004
D. G. Musaev T. Matsubara M. Mebel

Results of ab initio molecular orbital studies are presented for one elementary reaction and two full catalytic cycles of organo-transition metal complexes: (i) the oxidative addition of H-H, C-H, N-H, 0-H and Si-H bonds to CpRh(C0) in gas phase, (ii) the full catalytic cycle of hydroboration of olefin with Rh(PR3)2Cl, and (iii) the full catalytic cycle of hydroformylation of olefin with RhH(C0...

Journal: :The journal of physical chemistry. A 2008
Yu Adam Zhang Vishakha Monga Chris Orvig Yan Alexander Wang

Pyridinethiones are important ligand precursors of coordination complexes of therapeutic value. In aqueous solution, pyridinethiones can dimerize and tautomerize to the corresponding thiols. However, the tautomerism of pyridinethiones, which can impact on therapeutic performance, is yet not fully understood. To resolve this important issue, we have carried out ab initio and DFT calculations to ...

Journal: :Chemical communications 2015
Holger Braunschweig William C Ewing Katharina Ferkinghoff Alexander Hermann Thomas Kramer Rong Shang Eva Siedler Christine Werner

The reactions of isonitriles with a variety of metalloboryl and metalloborylene species are shown to yield a range of products, none of which display the typical Lewis acid-base reactivity previously observed between such metal complexes and other Lewis bases. Insertions of one, or several, isonitriles into the metal-boron bond give cyclic and spiro compounds with bonding controlled by the elec...

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