Synthesis, molecular structure and chemical properties of a new tungstosilicate with an open Wells–Dawson structure, α-[Si2W18O66]16−

2003 ◽  
pp. 2360-2361 ◽  
Author(s):  
Nathalie Laronze ◽  
Jérôme Marrot ◽  
Gilbert Hervé
Keyword(s):  
Molecular Structure ◽  
Chemical Properties ◽  
Dawson Structure ◽  
And Chemical Properties

The Extraction of Main Chemical Compositions in Rumex Root

2011 ◽  
Vol 382 ◽  
pp. 372-374
Author(s):  
Yong Jiang ◽  
Zhi Bin Jiang ◽  
Guo Jie Shao ◽  
Dong Cheng Guo ◽  
Yu Tian ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Chemical Properties ◽  
Ethanol Extract ◽  
Chemical Compositions ◽  
Physical And Chemical Properties ◽  
Experimental Basis ◽  
Development And Utilization ◽  
Physical And Chemical ◽  
Root Methods ◽  
And Chemical Properties

Purpose: The purpose of this study was to study the compositions of the polygonaceae medicinal plants called rumex root. Methods: Solvent method and chromatography was used to purificate the chemical compositions of Rumex, and the molecular structure of the compound was identified by physical and chemical properties and spectral data. Results: Two compounds were obtained from the ethanol extract of rumex root, which were identified as Chrysophanol and Physcione. Conclusions: Experimental basis was provided for the further study of the active ingredients of rumex root and the development and utilization of medical resources.

The reaction of [Rh(CO)2Cl]2 with hexafluorobut-2-yne

1978 ◽  
Vol 31 (3) ◽  
pp. 661 ◽  
Author(s):  
RS Dickson ◽  
SH Johnson
Keyword(s):  
Molecular Structure ◽  
Approximate Formula ◽  
Chemical Properties ◽  
Extensive Study ◽  
Rhodium Complex ◽  
And Chemical Properties

The reaction of [Rh(CO)2Cl]2 with CF3C≡CCF3 gives a fluorocarbon-rhodium complex of approximate formula [RhCl(CO)2 or 3(C4F6)]n,xH2O,yC6H6. The complex is an intermediate in the formation of tetrakis(trifluoromethyl)cyclopentadienone from CF3C≡CCF3 and CO in the presence of[Rh(CO)2Cl]2. The molecular structure of the complex remains obscure despite extensive study of its spectroscopic and chemical properties. The major products formed in the reactions of the complex with σ-cyclopentadienylthallium and with triphenylphosphine are (η- C5H5)2Rh2(CO)2(CF3C2CF3)and Rh(CO)Cl(PPh3)2 respectively.

On eccentricity-based topological descriptors of water-soluble dendrimers

2018 ◽  
Vol 74 (1-2) ◽  
pp. 25-33 ◽  
Author(s):  
Zahid Iqbal ◽  
Muhammad Ishaq ◽  
Adnan Aslam ◽  
Wei Gao
Keyword(s):  
Molecular Structure ◽  
Chemical Properties ◽  
Topological Indices ◽  
Water Soluble ◽  
Connectivity Index ◽  
Topological Descriptors ◽  
Physical And Chemical Properties ◽  
Eccentric Connectivity Index ◽  
Physical And Chemical ◽  
And Chemical Properties

AbstractPrevious studies show that certain physical and chemical properties of chemical compounds are closely related with their molecular structure. As a theoretical basis, it provides a new way of thinking by analyzing the molecular structure of the compounds to understand their physical and chemical properties. The molecular topological indices are numerical invariants of a molecular graph and are useful to predict their bioactivity. Among these topological indices, the eccentric-connectivity index has a prominent place, because of its high degree of predictability of pharmaceutical properties. In this article, we compute the closed formulae of eccentric-connectivity–based indices and its corresponding polynomial for water-soluble perylenediimides-cored polyglycerol dendrimers. Furthermore, the edge version of eccentric-connectivity index for a new class of dendrimers is determined. The conclusions we obtained in this article illustrate the promising application prospects in the field of bioinformatics and nanomaterial engineering.

ChemInform Abstract: METAL CLUSTERS IN CATALYSIS. 7. MOLECULAR STRUCTURE AND CHEMICAL PROPERTIES OF A NOVEL METAL-METAL BONDED NICKEL COMPLEX

1977 ◽  
Vol 8 (10) ◽  
pp. no-no
Author(s):  
V. W. DAY ◽  
S. S. ABDEL-MEGUID ◽  
S. DABESTANI ◽  
M. G. THOMAS ◽  
W. R. PRETZER ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Nickel Complex ◽  
Metal Clusters ◽  
Chemical Properties ◽  
Metal Metal ◽  
And Chemical Properties

Study of the molecular structure, electronic and chemical properties of Rubescin D molecule

2020 ◽  
Vol 63 ◽  
pp. 104-121 ◽  
Author(s):  
R.A. Yossa Kamsi ◽  
G.W. Ejuh ◽  
P. Mkounga ◽  
J.M.B. Ndjaka
Keyword(s):  
Molecular Structure ◽  
Chemical Properties ◽  
And Chemical Properties

scholarly journals Sila-Pharmaka, 14. Mitt. Darstellung und Eigenschaften sowie Kristall-und Molekülstruktur von Sila-Difenidol /Sila-Drugs, 14th Communication Preparation and Properties as well as Crystal and Molecular Structure of Sila-Difenidol

1979 ◽  
Vol 34 (9) ◽  
pp. 1279-1285 ◽  
Author(s):  
R. Tacke ◽  
M. Strecker ◽  
W. S. Sheldrick ◽  
E. Heeg ◽  
B. Berndt ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bond ◽  
Mass Spectroscopy ◽  
Crystal And Molecular Structure ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
H Nmr ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract Sila-difenidol (6b), a sila-analogue of the drug difenidol (6a), was synthesized according to Scheme 1. 6b and its new precursors 3 and 5 were characterized by their physical and chemical properties, and their structures confirmed by elementary analyses, 1H NMR and mass spectroscopy. 6 b crystallizes orthorhombic P212121 with a = 11.523(1), b = 14.366(4), c = 11.450(1) Å, Z = 4, Dber = 1.14 gcm-3. The structure was refined to R = 0.050 for 1897 reflexions. A strong nearly linear intramolecular O-H···N hydrogen bond of 2.685 Å is observed. The anticholinergic, histaminolytic and musculotropic spasmolytic activities of 6 a and 6 b are reported.

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