Synthesis and electrochemical study of iron, chromium and tungsten aminocarbenes: Role of ligand structure and central metal nature

2010 ◽  
Vol 55 (27) ◽  
pp. 8341-8351 ◽  
Author(s):  
Irena Hoskovcová ◽  
Jana Roháčová ◽  
Dalimil Dvořák ◽  
Tomáš Tobrman ◽  
Stanislav Záliš ◽  
...  
Keyword(s):  
Electrochemical Study ◽  
Central Metal ◽  
Ligand Structure ◽  
Metal Nature ◽  
Iron Chromium ◽  
And Tungsten

Cation-Induced Dimerization of Crown-Substituted Gallium Phthalocyanine by Complexing with Alkali Metals: The Crucial Role of a Central Metal

2021 ◽  
Vol 60 (3) ◽  
pp. 1948-1956
Author(s):  
Lyudmila A. Lapkina ◽  
Anna A. Sinelshchikova ◽  
Kirill P. Birin ◽  
Vladimir E. Larchenko ◽  
Mikhail S. Grigoriev ◽  
...  
Keyword(s):  
Crucial Role ◽  
Alkali Metals ◽  
Central Metal

Elucidating the Key Role of Phosphine−Sulfonate Ligands in Palladium-Catalyzed Ethylene Polymerization: Effect of Ligand Structure on the Molecular Weight and Linearity of Polyethylene

ACS Catalysis ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 6101-6113 ◽  
Author(s):  
Ryo Nakano ◽  
Lung Wa Chung ◽  
Yumiko Watanabe ◽  
Yoshishige Okuno ◽  
Yoshikuni Okumura ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ethylene Polymerization ◽  
Ligand Structure ◽  
Palladium Catalyzed

Organometallic Lewis Acids, Part LVIIII [1]. Directed Synthesis of Dinuclear Metal Carbonyl Complexes of Rhenium, Iron, Chromium, and Tungsten with a Single Unsupported Halide or Pseudohalide Bridge (Cl-, Br-, I-, CN-, C(CN)3-, NCS-, PPh2-, SH-) by Use of Re(CO)5FBF3

2014 ◽  
Vol 69 (11-12) ◽  
pp. 1215-1220
Author(s):  
Peter M. Fritz ◽  
Wolfgang Sacher ◽  
Wolfgang Beck
Keyword(s):  
Lewis Acids ◽  
Metal Carbonyl ◽  
Carbonyl Complexes ◽  
Metal Carbonyl Complexes ◽  
Directed Synthesis ◽  
Iron Chromium ◽  
And Tungsten

Abstract By use of Re(CO)5FBF3 the complexes with a single unsupported halide or pseudohalide bridge [Cp(OC)2Fe-X-Re(CO)5]+ BF4- (X=Cl, I, PPh2), (OC)5M-X-Re(CO)5 (M=Cr, W; X=Br, I, CN, NCS, SH), (OC)5W-N≡C-C[-C≡N-Re(CO)5]2+ BF4-, Cp(OC)(NC)Fe-C≡N-Re(CO)5, and [(OC)5Re-N3-Re(CO)5]+ BF4- have been synthesized.

scholarly journals Synthesis, characterization and antibacterial activity of metalloporphyrins: Role of central metal ion

2020 ◽  
Vol 2 ◽  
pp. 100073
Author(s):  
Belete B. Beyene ◽  
Ayenew M. Mihirteu ◽  
Misganaw T. Ayana ◽  
Amogne W. Yibeltal
Keyword(s):  
Antibacterial Activity ◽  
Metal Ion ◽  
Central Metal

Theoretical study of first row transitional metals effects on stabilization of verdoheme analogues

2019 ◽  
Vol 23 (10) ◽  
pp. 1100-1109
Author(s):  
Afsaneh Taghizadeh ◽  
Maryam Daghighi Asli ◽  
Parisa Rajabali Jamaat
Keyword(s):  
Chemical Potential ◽  
Dft Method ◽  
Basis Set ◽  
Orbital Energy ◽  
Central Metal ◽  
Transitional Metals ◽  
Solvent Phase ◽  
Energy Formula ◽  
Homo And Lumo

Heme catabolism is an important physiological process that converts heme to biliverdin in the presence of heme oxygenase which has an essential role in destroying unwanted heme. Verdohemes, the green iron (II) complexes of the 5-oxaporphyrin macrocycle are produced by oxidative destruction of heme. The main goal of this study is clarification of the central metal effect on stabilization of metal 5-oxaporphyrin molecules. To investigate the role of central metal on geometric and electronic properties of five coordinated verdoheme analogues, the first row transitional metals, including Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn, as the central metal of five-coordinated metal 5-oxaporphyrins were systematically calculated without any symmetry constraint by using the B3LYP as DFT method and the 6-31G basis set in gas and solvent phases. According to the results, the stabilization energy of metal 5-oxaporphyrins increases with atomic mass in the solvent phase more than in the gas phase. By reviewing the properties such as the computed frontier orbital energy, HOMO and LUMO gap energy [Formula: see text], hardness [Formula: see text], chemical potential [Formula: see text], softness (s) and electrophilicity [Formula: see text], the pharmaceutical use of this compound can be discussed.

scholarly journals Role of Minerals and Trace Elements in Diabetes and Insulin Resistance

Nutrients ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1864 ◽  
Author(s):  
Pallavi Dubey ◽  
Vikram Thakur ◽  
Munmun Chattopadhyay
Keyword(s):  
Insulin Resistance ◽  
Trace Elements ◽  
Relevant Information ◽  
Micronutrient Deficiencies ◽  
Essential Trace Elements ◽  
Cobalt Iron ◽  
Different Populations ◽  
Minerals And Trace Elements ◽  
Iron Chromium

Minerals and trace elements are micronutrients that are essential to the human body but present only in traceable amounts. Nonetheless, they exhibit well-defined biochemical functions. Deficiencies in these micronutrients are related to widespread human health problems. This review article is focused on some of these minerals and trace element deficiencies and their consequences in diabetes and insulin resistance. The levels of trace elements vary considerably among different populations, contingent on the composition of the diet. In several Asian countries, large proportions of the population are affected by a number of micronutrient deficiencies. Local differences in selenium, zinc, copper, iron, chromium and iodine in the diet occur in both developed and developing countries, largely due to malnutrition and dependence on indigenous nutrition. These overall deficiencies and, in a few cases, excess of essential trace elements may lead to imbalances in glucose homeostasis and insulin resistance. The most extensive problems affecting one billion people or more worldwide are associated with inadequate supply of a number of minerals and trace elements including iodine, selenium, zinc, calcium, chromium, cobalt, iron, boron and magnesium. This review comprises various randomized controlled trials, cohort and case-controlled studies, and observational and laboratory-based studies with substantial outcomes of micronutrient deficiencies on diabetes and insulin resistance in diverse racial inhabitants from parts of Asia, Africa, and North America. Changes in these micronutrient levels in the serum and urine of subjects may indicate the trajectory toward metabolic changes, oxidative stress and provide disease-relevant information.

Role of Ligand Structure and Basicity on the Extraction of Uranyl Isoxazolonate Adducts

2004 ◽  
Vol 22 (1) ◽  
pp. 13-29 ◽  
Author(s):  
A. Bhattacharyya ◽  
P. K. Mohapatra ◽  
S. Banerjee ◽  
S. Basu ◽  
V. K. Manchanda
Keyword(s):  
Ligand Structure
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