consist of a primary long-chain backbone molecule with attached side groups. The preparation of polyurethanes is a process of polymerisation whereby a diisocyanate and a dihydroxyl compound react together. Polyurethanes by definition are linear polymers that have a molecular backbone containing carbamate groups (-NHCO2). These groups‚ called urethane‚ are produced through a direct chemical reaction between functional groups of a diisocyanate and a Polyol. First developed in late 1930s‚ polyurethanes
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Can a group of people function effectively without someone being in charge? I believe that a group of people cannot function effectively without someone being in charge. There are 2 main points. A leader is someone who gathers the group together‚ and allows the group work more efficiently. I believe that a group leader is supposed to be a role model for the whole group‚ someone that everyone follows. If a group didn’t have a leader‚ the group would be scattered. Firstly‚ a leader is responsible
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Lecture # 1 Organic Chemistry- 1. It is a science that deals with the study of Carbon compounds but not all compounds containing under organic compounds. Non-Organic Compounds a. CO- Carbon monoxide b. CO2- Carbon dioxide c. CO3- Carbonates d. HCO3- Hydrogen carbonates e. CN- -Cyanides 2. There are over millions of compounds and inorganic is approximately 100‚000. 3. A science that deals with matter obtained from natural or living sources. 4. Study of Carbon Compounds
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contains the element oxygen 2. Isomers are molecules that a) react readily with one another b) have the same molecular formula c) have different molecular masses d) differ in the number of unsaturated bonds e) must contain the same functional group 3. In living organisms‚ buffers do which of the following? a) prevent charged particles from entering cells b) neutralize the effect of enzymes c) maintain pH in the cells within a narrow range‚ allowing enzymes to function d) allow
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increase the percentage yield‚ and obtain more accurate results. These reactions tend to split into two groups: Addition of the Grignard reagent to a compound containing multiple bond group such as: Which is the process of addition of the R group of RMgX occurs at the less electronegative and the MgX group at the higher electronegative atom. Which means that the R group is the negative and the MgX group is the positive ends of the dipole in the
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costs more than $200 million. 1. First the drug must be isolated or synthetized. 2. The drug is tested on animals. LD50 and ED50 are determined. 3. The drug moves to Clinical Trials a. Human Pharmacology – testing on small group of healthy volunteers for safety b. Therapeutic Exploratory – evaluates drug’s efficiency and side effects c. Confirmatory Stage – large-scale testing of drug 4. A local drug regulatory agency approves a medicine and decides whether
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hydroxyl group of an alcohol. This type of reaction is representative of an important class of reactions in organic chemistry called nucleophilic aliphatic substitution reactions. There are numerous ways of doing this transformation‚ and we will discuss these in lecture. In this experiment you will convert an alcohol to an alkyl halide by reaction with a hydrohalic acid. The overall reaction is shown in equation 1; however the mechanism of the reaction depends on the structure of the alkyl group bearing
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CHEMISTRY 125 LABORATORY Name: Balagao‚ Sherey Mae U. Date Performed: September 8‚ 2014 Lab Schedule: 1:00-4:00 MW Date Submitted: September 19‚ 2014 Group No.: 4 Rating: Exercise No. 8 CARBOXYLIC ACIDS AND ACID DERIVATIVES I. OBJECTIVES: • To investigate the physical and chemical properties of Carboxylic acid and its derivatives • To understand the reactions of carboxylic compounds and derivatives. II. EXPERIMENTAL
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and nitrogen may attach to the carbon backbone to form reactive “clusters of atoms” called functional groups • These functional groups possess chemical properties that are passed on to the hydrocarbon chain that they are attached to. They are also considered much more reactive than the hydrocarbon chain they are attached to. • Refer to Figure 4 on pg. 26 • The hydroxyl group (-OH) and the carboxyl group (-COOH) are polar which help to make sugars and alcohols highly soluble in water • Amines
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Hours : : : : : CHM 556 Organic Chemistry II Degree 4 3 hr (Lecture) 3 hr (Practical) 3 Core CHM 456 Part Course Status Pre-requisite : : : Course Outcomes : Upon completion of this course‚ students should be able to: 1. Determine functional groups present in organic compounds using Infrared Spectroscopy and interpret Nuclear Magnetic Resonance spectra and relate the information to structural features of organic compounds. State and explain principles governing the physical and chemical
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