Transition metal

Objective The purpose of the experiment is to synthesize multiple cobalt complexes with various ligands and explain the ligand field transitions of these complexes using Ultraviolet-Visible (UV-Vis) spectroscopy. The experiment provides insight into specific colors of certain molecular species and respective bonding information. Introduction Transition elements are defined by the IUPAC as atoms that have an incomplete d-subshell, most commonly referring to the d-block.1 When transition metals are not bonded to any other molecule, the d-orbitals are degenerate.2 However, when the metal starts bonding with other ligands, effects on the electrons attached to the metal are induced. Specifically, the d-orbitals split, obtain different energy…

INTRODUCTION Have you ever observed the interaction of two people and based on their body language you arrived at the conclusion that they may have been divorced for a year, remarried two years later, and on the verge of another divorce? Ok, that may be a little too detailed and you have keen observation skills, but what about observing one individual? These are some of the times that we bring out our Sociological Imagination which is the ability to see our personal lives in the context of the…

Pre-Lab Questions 1. What are the steps of the scientific method? Briefly explain each. • The steps of the scientific method are observation, define problem, construct a hypothesis, test the experiment/ gather evidence, and draw a conclusion. Observation is the procedure of collecting information about events and processes carefully. It involves with seeing and hearing. Defining the problem is when you identify a conflict that requires a solution to be solved. A hypothesis is a proposed…

electron configurations for each of the elements. From this data you can find the total number of electrons, the total number of shells and subshells, as well as how many electrons are in each shell. The large number (the one in 1s2 ) will tell you the shell that the electrons are in. For example, helium (He) has one shell, so its electron configuration is 1s2. Furthermore, the electron configuration tells you what subshell each of the electrons occupy. The subshell is the letter next to the…

Sam Kean, a Washington D.C. writer with works in The New York Times Magazine, Mental Floss, Slate, The Believer, Air & Space, Science, and The New Scientist, has created a user-friendly book about how to explain the periodic table and the elements that occupy it by writing the book The Disappearing Spoon: And Other True Tales of Madness, Love and the History of the World From the Periodic Table of Elements. He provides an insight into the world of chemistry that relates to his audience, even…

off the edges of the beaker, and sent off tiny sparks. When the element was added to the weak acid H2SO4, a similar reaction occurred. The element reacted immediately and bubbled. A gas was let out and the element completely dissolved, leaving the acid cloudy and opaque rather than clear. When the element was added to the weak base NaOH, it also reacted immediately and completely and let out bubbles and gas. The third element (A5) tested was an unknown transition metal. The density was…

Results and dissection 3.1 Transition metal complexes of the macrocyclic, H6L Ligand 3.1.1 The macrocyclic, H6L Ligand The physical and analytical data of the macrocyclic, H6L ligand and its transition metal complexes were shown in Table 1. From the investigation, the expected structure of H6L with its possible toutomeric forms can be represented as shown in Figure 1. H6L ligand is highly symmetric under the point group C2v symmetry and can show all the normal modes of vibrations by solving…

combination of the hydrogenated complex, ammonium or ammonia, and a methyl radical; a radical rebound (RR) to form a methanol adduct and ammonium; methanol dissociation from the metal; and catalysis regeneration via oxygen atom transfer. We modeled these steps as stationary points throughout the reaction coordinate, each point consisting of a sum of the reactants, intermediates, or products of each step. Our research mainly focuses on the energy barrier of the C-H…

program would be encouraged to dig deep, pinpointing core issues within that have affected them negatively leading them to the path as to where they are. This process will allow the individual to go through a healing process, thus facilitating inner growth. We will ask participants to look at themselves through group therapy sessions, individual counseling, mentoring, pre and post self-assessments, and progressive goal setting. During this phase, they will also have the opportunity to reconcile…

manganese cobalt oxide (NMC) made up many of these batteries and could dissociate in aquatic environments. Prior experiments, such as Hang et. Al. 2016, reported detrimental effects of dissociated NMC on aquatic microorganisms.1 In the first part of this project, the objective was to explore and develop an effective method to measure nickel (Ni) and cobalt (Co) concentration spectrophotometrically. This step was crucial for the second part of the project, which was to quantitatively analyze the…