Carbon Chains Essay

THEORY Injection molding is the most commonly used manufacturing process for the fabrication of plastic parts. A wide variety of products are manufactured using injection molding, which vary greatly in their size, complexity, and application. The injection molding process required the use of an injection molding machine, raw plastic material, and a mold. The plastic is melted in the injection molding machine and then injected into the mold, where it cools and solidifies into the final part.…

spacecraft carbon nanotubes are expected to used. Rocket propulsion, of course, includes combustion. Combustion is where a substance reacts with oxygen and gives off heat. The source of oxygen is called an oxidizer…

Chlorine is an element that consists of 17 protons, an average of 18.5 neutrons and 17 electrons. It has an atomic number of 17, and an average nuclear charge of 35.5. There are 2 isotopes of chlorine that are 35Cl and 37Cl. 35Cl has an atomic mass of 35 and a natural abundance of 75%. 37Cl has an atomic mass of 37 and a natural abundance of 25%. The average atomic mass or nuclear charge equates to 35.5. Both of the isotopes have the same atomic number. (BBC Bitesize. Atoms and the periodic…

A possible chemical reason that this experiment yielded less than 100% triphenylcarbinol was caused by the Grignard reagent reacting with atmospheric water or oxygen instead of reacting with benzophenone due to the highly reactive nature of the Grignard reagent and a constant presence of humidity and moisture inside the laboratory. Although extra precautions were taken to dry to glassware and a CaCl2 drying tube was used, there was an unavoidable exposure of the Grignard reagent to atmospheric…

HARDNESS Hardness of a material is most commonly defined as the measure of its resistance to penentration by an indenter.Hardness is also measure of strength and often has the units of stress .The indenter is often fabricated from a hard material such as diamond or hardened steel.The tips of the indenters may be conical,pyramidal,or spherical in shape.The indenter tips may also be relatively small(nano-or micro-indenters) or very large(macroindenters).Since indentation tests are relatively easy…

a) Heckel equation In 1961, Heckel proposed the most widely used equation describing pharmaceutical powder behavior in compaction. It was initially used to study the densification of ceramics and its correlation with pressure. It a first order process where powder pores elimination rate is correlated to the number of pores present. The rate of volume reduction increases as the number of pores decrease. Heckel equation relates the density, pressure and the pore fraction of the powder [16],.…

derivatives of 3-aryl-4(3H)-quinazolinone-2-carboxaldehyde and related schiff bases have been synthesized by Aly et al, 2010.These compounds showed not only anticonvulsant but also analgesic,and cytotoxic potential due to the presence of the side chain of themicarbazone with free amino group and fluorine atom. Anti Inflammatory and Analgesic Activity: (Nithinchandra et al, 2012) synthesized Sydnone containing new schiff bases derivatives (compound 55) and then screened for their…

gently for 5 minutes. Allow the mixture to cool slightly and filter by gentle suction and wash it 3-4 times with CCl4. Recrystallize it from the boiling water. Mechanism: The Reaction involves: Nucleophilic attack of NH2 of glucine on the carbonyl carbon of benzoyl chloride Rearrangment and deprotonation (elimination of HCl molecule) to give benzoyl glycine Step II: Preparation of 4-Benzylidine-2-phenyl-oxazol-5-one from benzoyl…

Diamonds. These small and rare rocks have been considered prized possessions throughout the ages. Diamonds are as old as the earth itself, and ever since their discovery they have captivated humans. Diamonds have come to represent many things, but in this paper, I will focus on power. I will track a certain diamond through its’ dated 350-year period, and use it to understand the individuals who owned it and the power it gave them. The diamond I refer to is the hope diamond. The Hope diamond is…

In Experiment 12B we used an umpolung reagent in an umpolung synthesis to synthesize benzoin from benzaldehyde. Umpolung synthesis is a synthetic approach that allows us to switch the identity of a reacting species. For example, the normal chemical reactivity of a nucleophile can be switched to one of an electrophilic compound. Two common agents are cyanide and thiamine (Vitamin B). The mechanisms for both agents are the same. In this experiment, thiamine was used to turn benzaldehyde, an…