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Physical Sciences and Mathematics Commons

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Chemistry

Selected Works

2010

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Articles 121 - 123 of 123

Full-Text Articles in Physical Sciences and Mathematics

Reallocation Of Mesh Points In Fluid Problems Using Back-Propagation Algorithm, Philadelphia University Dec 2009

Reallocation Of Mesh Points In Fluid Problems Using Back-Propagation Algorithm, Philadelphia University

Philadelphia University, Jordan

No abstract provided.


Ru(Iii), Pd(Ii), Pt(Iii) And Pt(Iv) Complexes Of A Novel 32-Membered Unsymmetrical Macrocyclic Ligand, Mohammad Mansoob Khan Dr Dec 2009

Ru(Iii), Pd(Ii), Pt(Iii) And Pt(Iv) Complexes Of A Novel 32-Membered Unsymmetrical Macrocyclic Ligand, Mohammad Mansoob Khan Dr

Dr. Mohammad Mansoob Khan

Reactions of [N12] macrocyclic ligand, L·2HClO4, with RuCl3, PdCl2, K2[PtCl6], [K2PtCl4] as well as [M(Ph3P)2Cl2] (M = Pd or Pt), and [Ru(Ph3P)3Cl2] produces bimetallic complexes whose analytical data are consistent with the molecular formulae as Ru2LCl4(ClO4)2 (I), Pd2LCl2(ClO4)2 (II), Pt2LCl6(ClO4)2 (III), Pt2LCl2(ClO4)2 (IV) and Ru2LCl2(ClO4)2 (V). Reactions of the ligand with the precursors [M(Ph3P)2Cl2] (M = Pd or Pt), and [Ru(Ph3P)3Cl2], has released all the Ph3P ancillary ligand in solution. Magnetic moment, IR and UV-visible spectroscopic data confirms the encapsulation of metal ions in the macrocyclic cavities through chelation from aza groups of the unsymmetrical imine ( C N ) …


Mining And Civilization, An Illustrated History, Fathi Habashi Dec 2009

Mining And Civilization, An Illustrated History, Fathi Habashi

Fathi Habashi

Mining and Civilization has been conceived to compliment the author's two books History of Metallurgy and Readings in Historical Metallurgy and to fill a gap in the literature. It is difficult to study the history of metallurgy without studying the history of mining at the same time. Each time the author visits ancient ruins or examines an ancient stone statue he recalls the work of miners who brought the material from a quarry so that the sculptor can create a work of art. History of mining, quarrying, and stone carving is history of civilization.