University of Alabama

About: University of Alabama is a education organization based out in Tuscaloosa, Alabama, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 27323 authors who have published 48609 publications receiving 1565337 citations. The organization is also known as: Alabama & Bama.

13C NMR Spectroscopy of “Arduengo-type” Carbenes and Their Derivatives

Abstract: Since the isolation and crystallographic characterization of the first stable N-heterocyclic carbene in early 1991,1 nucleophilic diaminocarbenes (also known as “Arduengotype” carbenes) and their analogues have emerged as a powerful class of carbon-based ligands with broad applications in metal-based catalytic reactions.2-12 The main reason for their success in catalysis is their superior properties as ligands in comparison with their phosphine counterparts.11,13-18 In addition, carbene organocatalysis has emerged as an extremely fruitful area of research in synthetic organic chemistry. The benzoin condensation, the Stetter reaction, transformations involving homoenolates, 1,2-additions, transesterifications, and ring opening polymerizations are among the many reactions promoted by nucleophilic carbenes. Several excellent reviews, chapters, and books highlighting the recent progress of nucleophilic carbenes in metal-based catalysis and organocatalysis are available.7,9,11-16,19-24 Significant efforts have been made to better understand the unique properties associated with the free nucleophilic carbenes using a wide range of experimental techniques. X-ray diffraction,1,25 neutron diffraction,26,27 photoelectron spectroscopy,28 cyclic voltammetry,29-34 NMR spectroscopy, and IR spectroscopy10,35-40 are among the experimental techniques employed in these studies. The experimental methods have been complemented by theoretical investigations, which have become extremely important because they enable the study of a great number of related systems, a task that would be difficult or sometimes impossible to achieve experimentally. Density functional theory and molecular orbital theory have been employed for the study of these intriguing species.26-28,41-49

Clash of Civilizations, or Realism and Liberalism Déjà Vu? Some Evidence

Abstract: We assess the degree to which propositions from Samuel Huntington's The Clash of Civilizations and the Remaking of World Order can account for the incidence of militarized interstate disputes betwe...

Dissolution and processing of cellulose using ionic liquids

Abstract: Cellulose is dissolved in an ionic liquid without derivatization, and is regenerated in a range of structural forms without requiring the use of harmful or volatile organic solvents. Cellulose solubility and the solution properties can be controlled by the selection of the ionic liquid constituents, with small cations and halide or pseudohalide anions favoring solution.