David J. Berg
Bio: David J. Berg is an academic researcher from University of Victoria. The author has contributed to research in topics: Lanthanide & Ligand. The author has an hindex of 21, co-authored 63 publications receiving 1361 citations. Previous affiliations of David J. Berg include Lawrence Berkeley National Laboratory & University of British Columbia.
Papers published on a yearly basis
TL;DR: In this article, an electron exchange model for spin coupling between Yb(III), with electron configuration 4f13, and the single unpaired electron in the bipyridyl radical anion was presented, based on comparison with the iodide salt [(Me5C5)2YbIII(bipy0)]+[I]-.
TL;DR: The 1:1 adducts with phthalazine and azobenzene and the 1:2 adduct with pyridazine are soluble in toluene, from which they may be isolated by crystallization.
TL;DR: In this paper, the divalent metallocenes of ytterbium (Me/sub 5/C/Sub 5//sub 2/)(OEt/sub 2/) react with molecules of the type REER to give the trivalent ybium complexes, where L is a phenyl or substituted phenyl group.
TL;DR: In this article, the role of the shape of coordinating ligands and of different metal ions in directing the synthesis totally or preferentially towards mono-, di- or poly-nuclear entities is discussed.
TL;DR: The International Tables for X-ray Crystallography (ITC) as mentioned in this paper were published by the International Union of Crystallographers (IUC) for the first time in 1952.
Abstract: International Tables for X-Ray Crystallography (Published for the International Union of Crystallography.) Vol. 1: Symmetry Groups. Edited by Norman F. M. Henry and Kathleen Lonsdale. Pp. xi + 558. (Birmingham: Kynoch Press, 1952.) 105s.
TL;DR: This review is focused on the use of solid Lewis acids to promote catalytic oxidations, and the core of the review is organized to show the evolution from the simplest strategy for heterogeneizing homogeneous catalysts, to the more elaborate ones in which the active sites are part of the solid structure.
Abstract: This review is focused on the use of solid Lewis acids to promote catalytic oxidations. While the concept of using Lewis acids to promote the reaction of organic substrates with oxidizing reagents is widely accepted in homogeneous catalysis, this concept has not become evident and generally used in heterogeneous catalysis until recent days. Certainly the development of new Lewis acid solids active and selective for catalytic oxidations is an urgent need and a challenging scientific target for some substrates especially using environmentally friendly oxidants. Since the replacement of current stoichiometric oxidations for the production of fine chemicals by environmentally benign catalytic oxidations is one of the major tasks in green chemistry, solid Lewis acids are called to play a crucial role to accomplish this goal. In the review, we will see the still important role that stoichiometric oxidations play in our daily life, and how they are being substituted by catalytic oxidations. At this point, three general mechanisms in which Lewis acids are involved will be described, and the material has been organized starting from homogeneous and ending with solid catalysts for heterogeneous oxidations. A bridge between the two will be established by presenting catalytic systems that can fill the gap between the two systems helping to rationalize the nature of the catalytic active sites in solid systems. This review is obviously focused on solid oxidation catalysts, and the core of the review is organized to show the evolution from the simplest strategy for heterogeneizing homogeneous catalysts, i.e., supporting the active species on large surface area solids, to the more elaborate ones in which the active sites are part of the solid structure. Given the importance of metallosilicates, and more specifically titanosilicates, as catalysts in commercial processes, special attention has been paid to these types of materials. Although sufficient references are provided to early seminal work, special emphasis has been given to most recent contributions to this area, particularly of the last 10 years. Patent literature has also been extensively covered in this review. Examples to illustrate the concepts have been selected among recent publications, and an effort has been made to present a series of commercial and near commercial processes based on catalytic oxidations. Finally, two * E-mail: firstname.lastname@example.org. 3837 Chem. Rev. 2002, 102, 3837−3892
TL;DR: The main group and coordination chemistry of N-silylated benzamidines, RC6H4C(NSiMe3)[N(SiMe3)2], and their corresponding anions, [RC6H 4C(NSiME3]−, is reviewed in this paper.
TL;DR: A survey of radical ligand-containing single-molecule magnets can be found in this article, with a brief overview of other classes of metal-ligand radical complexes that could be exploited in the design of new single molecule magnet.