Acetylacetone was added to dissociate Co(II) to form the pink ionic salt complex Co(II)(acacH)3. Hydrogen peroxide was introduced which effected deprotonation of acacH enol form to bidentate acac allowing a stronger, more stable ion, [Co(acac)3]- to form . Hydrogen peroxide also reacted to oxidize Co(II) to Co(III) which ended in the resultant compound Co(acac)3. 1.
Melt range was employed to conclude if the expected product had been obtained and how pure it was by comparison to the pure product melt range of 210C - 213C.2 Ultraviolet and visible light spectroscopy was used to determine that the extinction coefficients lay within the defined range of 103 C 105.1 Infrared spectroscopy was utilized to conclude that the intermolecular bond activity was consistent with expected, pure Co(acac)3 bonds.13 Nuclear magnetic resonance was used to establish that the hydrogen atom interactions of the molecule were in the correct one to six (1:6) CH to CH3 ratio present in pure Co(acac)3.14 The results gave a high percent yield (77.6%), a low percent error (0.469%), and showed a very pure product by comparison.
Introduction .
Background.
Transitional metal oxide nanoparticles have become the focus of much research and development in recent years due to the significant alteration of their properties at the nanometer scale and the ability to tailor their geometry; use of environmentally friendly procedures has become the norm.9 Metal acetylacetonates have been instrumental to this study as they have been used as the general precursors to transition metal oxide nanomaterial synthesis.10 Cobalt was chosen for this experiment due to its instability which has caused to be easily oxidizable.1 The chelating acetylacetone ligand has been used for stabilization of Cobalt in Co(acac)3 synthesis due to its strong binding quality12 and relative environmentally friendly disposal.11 Without another moderately strong oxidizing agent, in this case hydrogen peroxide (H2O2), conversion to Co(acac)3 has been shown to occur slowly.
Cobalt Cobalt is a brittle, hard, transition metal with magnetic properties similar to those of iron. Cobalt is present in meteorites. ... Cobalt is mined throughout the world. ... Cobalt in Central Western Queensland. ... Cobalt 60 is used to treat cancer. ...
Cobalt based Superalloy An analysis of each material will be given in which I will explain the reasons why I chose it. ... Cobalt based Superalloy: The main elements of this alloy are Cobalt (Wt. 40%), Chromium (Wt. 20%), Iron (Wt. 16%), Nickel (Wt. 15%), and Molybdenum (Wt. 7%). A superalloy is a nickel, iron-nickel, or cobalt based alloy that have excellent heat, creep, and corrosion resistance. ... Cobalt has characteristics of being hard and brittle, but mixing it with other elements makes it strong and durable. ...
Important to understand is that Kant's three synthesis are actually the same single synthesis being described in different ways. ... "Synthesis" means the act of combining something. The three synthesis to be discussed can be thought of as a priori conceptual synthesis which serve as experience conditions. ... It is to be directly related to the second synthesis. ... The synthesis of apprehension and the synthesis of reproduction are bound together because they both makeup the transcendental acts of the mind. ...
Protein synthesis is the process of transferring information from a gene to a protein. ... RNA is a single-stranded nucleic acid molecule involved in protein synthesis, the structure of which is specified by DNA. ... These two main processes of protein synthesis, transferring information from a gene to a protein, are transcription and translation. ... Translation is the synthesis of a polypeptide, occurring under the direction of mRNA. This is the complex process of protein synthesis where the cell's proteins are always inside under specific instructions. ...
Medieval society developed a new way of living and viewing life, known as the medieval synthesis. The medieval synthesis was an outlook on life introduced by Thomas Aquinas that reformed the earlier ideas of logic and reason into a more logical and meaningful view on life, this can be seen in everyday medieval life by education, religion, and law. ... Religion was a crucial part to medieval society and development of medieval synthesis. ... Thomas Aquinas' theory of morality and law set a precedent for a new European law The revival Roman Law was the last part of medieval synthesis. R...
Characterization in "Great Expectations" In the book Great Expectations, Charles Dickens uses many forms of characterization to reveal his characters. ... Charles Dickens uses direct, and indirect characterization. ... The author proves this trough indirect characterization when Estella says, "You little coarse monster, what do you think of me now?" ... The author uses direct characterization when he shows how Pip describes the way that Estella speaks in a "taunting manner". ...
Lab Report for Chemical Reactions Experiment Objective: In this experiment students will attempt a number of different reactions. The students will confirm that a reaction did/did not occur by detailed observation, and predict the products of each reaction by performing basic tests. Hypoth...
Tolkein's characterization of Bilbo can be classified into three methods: physical description, mental process, and actions. ... In a reader's mind the most necessary form a characterization is a physical description. ... At this point, Tolkien uses his last method of characterization; Now the reader will learn how Bilbo acts. ... Through physical characterization, Bilbo took shape. With mental characterization, Bilbo became understandable. ...
Characterization is the process by which writers create, reveal, or develop their characters. ... Characterization may be achieved through what other characters in the story say. ... Characterization is an important element in almost every work of fiction, whether it is a short story or a novel. ... Without proper characterization there would be little meaning to the piece. Stories need strong characterizations both to help move the plot along and to create an emotional context to which the reader can respond. ...