Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Some Properties Of Rare Earth Nitrilotriacetate Complexes
Download Some Properties Of Rare Earth Nitrilotriacetate Complexes full books in PDF, epub, and Kindle. Read online Some Properties Of Rare Earth Nitrilotriacetate Complexes ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Some Properties of Rare Earth-nitrilotriacetate Complexes by : Samuel C. Levy
Download or read book Some Properties of Rare Earth-nitrilotriacetate Complexes written by Samuel C. Levy and published by . This book was released on 1962 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Four New Rare-earth Nitronyl Nitroxide Radical Complexes: Magnetic and Luminescent Properties by :
Download or read book Four New Rare-earth Nitronyl Nitroxide Radical Complexes: Magnetic and Luminescent Properties written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nitrogen Donor Ligands in the Coordination Chemistry of the Rare Earth and Alkaline Earth Metals by : Jelena Jenter
Download or read book Nitrogen Donor Ligands in the Coordination Chemistry of the Rare Earth and Alkaline Earth Metals written by Jelena Jenter and published by Cuvillier Verlag. This book was released on 2010-05-27 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bis(phosphinimino)methanide rare earth metal bisborohydrides, as illustrated in Scheme I, were successfully synthesized by salt metathesis reactions of [K{CH(PPh2NSiMe3)2}] with [Ln(BH4)3(THF)n] (Ln = Sc (n = 2); Ln = La, Nd, Lu (n = 3)) or in the case of yttrium by the reaction of [{(Me3SiNPPh2)2CH}YCl2]2 with NaBH4. Interestingly, the BH4- anions are ?3-coordinated in the solid state structures of 3, 4, 6 and 7, while for the scandium complex 5 two different conformational polymorphs were identified, in which either both BH4- groups are ?3-coordinated or one BH4- anion shows an ?2-coordination mode. Furthermore, complexes 3, 6 and 7 showed high activities in the ring-opening polymerization (ROP) of e-caprolactone (CL). At 0 °C, the molar mass distribution reached the narrowest values ever obtained for the ROP of CL initiated by a rare earth metal borohydride species. In collaboration with N. Meyer, rare earth metal chlorides and borohydrides of the 2,5-bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl ligand were synthesized, as shown in Scheme II. The reaction of [(DIP2pyr)K] (10) with anhydrous neodymium trichloride afforded [(DIP2pyr)NdCl2(THF)]2 (12) which is dimeric in the solid state. Excitingly, the reaction of [(DIP2pyr)K] (10) with [Ln(BH4)3(THF)n] (Ln = Sc (n = 2); Ln = La, Nd, Lu (n = 3)) depends on the ionic radii of the center metals. For the larger rare earth metals lanthanum and neodymium, the expected products [(DIP2pyr)Ln(BH4)2(THF)2] (Ln = La (13), Nd (14)) were obtained; while for the smaller rare earth metals scandium and lutetium, an unusual redox reaction of a BH4- anion with one of the Schiff-base functions of the ligand was observed and the products [{DIP2pyr*-BH3}Ln(BH4)(THF)2] (Ln = Sc (15), Lu (16)) were formed (Scheme II). Moreover, the two neodymium containing complexes 12 and 14 were investigated as Ziegler-Natta catalysts for the polymerization of 1,3-butadiene to form poly-cis-1,4-butadiene, by using various cocatalyst mixtures. Very high activities and good selectivities were observed for 12. The 2,5-bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl ligand was successfully introduced into the coordination chemistry of the divalent lanthanides and the alkaline earth metals. As shown in Scheme III, salt metathesis reactions of [(DIP2pyr)K] (10) with either anhydrous lanthanide diiodides or alkaline earth metal diiodides afforded the corresponding heteroleptic iodo complexes [(DIP2pyr)LnI(THF)3] (Ln = Sm (19), Eu (20), Yb (21)) or [(DIP2pyr)MI(THF)n] (M = Ca (24), Sr (22) (n = 3); Ba (23) (n = 4)). Surprisingly, all complexes 19-24 are monomeric in the solid state, independently from the ionic radii of their center metals. Instead of forming dimers, the coordination sphere of each metal center is satisfied by additionally coordinated THF molecules, which is a very rare structural motif in the chemistry of the larger divalent lanthanides and alkaline earth metals. While the (DIP2pyr)- ligands in 19-23 are ?3-coordinated in the solid state, for the calcium complex 24 an ?2-coordination mode was observed (Scheme III). Interestingly, the calcium complex 24 and the analogous ytterbium compound 21 show different structures in the solid state. In order to obtain catalytically active species, [(DIP2pyr)M{N(SiMe3)2}(THF)2] (M = Ca (25), Sr (26)) were prepared by the reaction of [(DIP2pyr)MI(THF)3] (M = Ca (24), Sr (22)) with [K{N(SiMe3)2}] (Scheme IV). Compounds 25 and 26 were investigated for the intramolecular hydroamination of aminoalkenes and one aminoalkyne. Unfortunately, both catalysts exhibit a limited reaction scope, caused by the formation of undesired side products by alkene isomerization and imine-enamine tautomerism. However, both compounds are active catalysts and show high yields and short reaction times. The highest activities were observed for the calcium complex 25 and can be compared to the results obtained with the ß-diketiminato calcium amide [{(DIPNC(Me))2CH}Ca{N(SiMe3)2}(THF)] as a catalyst. Finally, imidazolin-2-imide and cyclopentadienyl-imidazolin-2-imine rare earth metal alkyl complexes, synthesized by M. Tamm et al., were investigated for the intramolecular hydroamination of non-activated aminoalkenes and one aminoalkyne. Both compounds showed high selectivities and activities, and although they cannot compete with the metallocene analogues, the imidazolin-2-imide complexes are new and interesting examples for catalytically active post-metallocenes.
Book Synopsis Technical Publications Announcements with Indexes by : United States. National Aeronautics and Space Administration
Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 1318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts written by and published by . This book was released on 1963-05 with total page 1756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstracts of dissertations and monographs in microform.
Author :Xerox University Microfilms Publisher :Ann Arbor, Mich. : Xerox University Microfilms ISBN 13 : Total Pages :1024 pages Book Rating :4.3/5 (91 download)
Book Synopsis Comprehensive Dissertation Index, 1861-1972: Chemistry by : Xerox University Microfilms
Download or read book Comprehensive Dissertation Index, 1861-1972: Chemistry written by Xerox University Microfilms and published by Ann Arbor, Mich. : Xerox University Microfilms. This book was released on 1973 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guide to Annual Subject Index for Technical Publications Announcements, Apr.-Dec. 1962 by : United States. National Aeronautics and Space Administration
Download or read book Guide to Annual Subject Index for Technical Publications Announcements, Apr.-Dec. 1962 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Promethium Technology by : Earl J. Wheelwright
Download or read book Promethium Technology written by Earl J. Wheelwright and published by . This book was released on 1973 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spectroscopic Properties of Inorganic and Organometallic Compounds by : D M Adams
Download or read book Spectroscopic Properties of Inorganic and Organometallic Compounds written by D M Adams and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopic Properties of Inorganic and Organometallic Compounds provides a unique source of information on an important area of chemistry. Divided into sections mainly according to the particular spectroscopic technique used, coverage in each volume includes: NMR (with reference to stereochemistry, dynamic systems, paramagnetic complexes, solid state NMR and Groups 13-18); nuclear quadrupole resonance spectroscopy; vibrational spectroscopy of main group and transition element compounds and coordinated ligands; and electron diffraction. Reflecting the growing volume of published work in this field, researchers will find this Specialist Periodical Report an invaluable source of information on current methods and applications. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading experts in their specialist fields, this series is designed to help the chemistry community keep current with the latest developments in their field. Each volume in the series is published either annually or biennially and is a superb reference point for researchers. www.rsc.org/spr
Download or read book Rare Earth Research written by and published by . This book was released on 1974 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Summary Research Report in Chemistry, Engineering, Metallurgy and Physics by : Ames Laboratory Staff
Download or read book Annual Summary Research Report in Chemistry, Engineering, Metallurgy and Physics written by Ames Laboratory Staff and published by . This book was released on 1962 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis IS. by : U.S. Atomic Energy Commission
Download or read book IS. written by U.S. Atomic Energy Commission and published by . This book was released on with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iowa State Journal of Science written by and published by . This book was released on 1962 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Iowa State College Journal of Science by :
Download or read book Iowa State College Journal of Science written by and published by . This book was released on 1962 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1970 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1962 with total page 1990 pages. Available in PDF, EPUB and Kindle. Book excerpt: