Salicylic Acid Salicylic acid(C7H6O3) is the other reactant that makes up ASA. It is an organic compound that is apart of the carboxyl group. This group contains acids called carboxylic acids which are general weak. Carboxylic acids are aldehydes that have been oxidized‚ aldehydes are oxidized alcohols. The double bonded O attached to the OH (or COOH) as a substituent in an organic molecule indicates a carboxylic acid. And as stated earlier‚ salicylic acid is derived from metabolized salicin. Acetic Anhydride
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Carbon and Its Compounds Carbon: Introduction Atomic Number: 6 Electronic Configuration: 2‚ 4. Valence electrons: 4 Property: Non-metal Abundance:- Carbon is the 4th most abundant substance in universe and 15th most abundant substance in the earth’s crust. Compounds having carbon atoms among the components are known as carbon compounds. Previously‚ carbon compounds could only be obtained from a living source; hence they are also known as organic compounds. Bonding In Carbon:- The Covalent
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fructose which is found in milk and galactose which is found in honey. Both pentoses and hexoses are mostly found in monosaccharides. They are the most simplest sugar which cannot be futher hydrolysed into smaller units. They contain either an aldehyde group or ketone group. They can de used to make polysaccharides‚ although only one type of monosaccharides is used in each type of monosaccharides. They have two types of linkage‚ that is 1‚4 and 1‚6 glycosidic bonds that are common between
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Identify structures that are products of the following reactions: a. Grignard reaction including identification of the nucleophile. b. Conversion of nitriles into carboxylic acids and acid derivatives c. Diels-Alder reactions d. Reduction of aldehydes and reagents used for that reaction. e. Fischer esterification including identification of nucleophile‚ catalyst‚ and leaving group. f. Reaction of acid chlorides to produce alcohols. g. Reaction of carbonyl compounds with amines to produce amides
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TEST | REAGENTS | PROCEDURE | RATIONALE/PRINCIPLE | POSITIVE REACTION | PHENYLHYDRAZINE | phenylhydrazine | | The aldehyde groups of simple carbohydrates will react with phenylhydrazine but instead of yielding typical phenylhydrazones they make what is termed osazones where the OH group immediately adjacent to the keto group is oxidized to a keto group and it too adds phenylhydrazine to form the yellow to pale orange osazones that have definite melting points. So assignment of presumptive identity
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i.e. Cx(H2O)y‚ although this ratio is often not strictly true and occasionally other atoms may be present. The carbons are arranges in a chain (most often 5-6 atoms) functionalized with alcohol groups. The terminal carbon either carries either an aldehyde or a ketone functional group. Carbohydrates are classified based on size of base carbon chain‚ number of sugar units‚ location of C=O and stereochemistry. Classifications of carbohydrate are monosaccharides‚ disaccharides‚ oligosaccharides‚ and polysaccharides
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presence of aldehyde or keto groups in the sugars. Sucrose is a non-reducing sugar because the aldehyde group of glucose is linked to the keto group of fructose and loses its reducing ability. The Benedict’s test is used as it allows the detection of the presence of reducing sugars. All monosaccharaides and some disaccharides which have exposed carbonyl groups will react with Benedict’s solution‚ whereas other disaccharides will not react with Benedict’s solution. The electrons from the aldehyde or ketone
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Carbohydrates are macromolecules whose basic units are called monosaccharides (or simple sugars). These simple sugars are polyhydroxy aldehydes (aldoses) or ketones (ketoses)‚ depending on the chemical nature of their carbonyl group‚ containing at least three carbon atoms. The smallest monosaccharides with only three carbon atoms are collectively known as trioses; while those with four‚ five‚ six‚ and so on carbon atoms are called tetroses‚ pentoses‚ hexoses and so on‚ respectively. Carbohydrates
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UNIVERSITY OF THE GAMBIA LECTURE NOTES COURSE: PRINCIPLES OF CHEMISTRY II (ORGANIC CHEMISTRY) CODE: CHM 161 2ND SEMESTER SESSION: 2012/2013 LECTURER: ANTHONY F. ADJIVON UNIT 1 INTRODUCTION Organic chemistry started as the chemistry of life‚ when that was thought to be different from the chemistry in the laboratory. Then it became the chemistry of carbon compounds‚ especially those found in coal. Now it is both. It is the chemistry of the compounds of carbon along with other elements
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However‚ carbohydrates are not true hydrates in the chemical sense. Carbohydrates‚ chemically‚ are polyhydroxy aldehydes (-CHO) or ketones (C=O) or compounds which upon hydrolysis yield these compounds. Note that each carbon in a polyhydroxy aldehyde or ketone structure‚ except for the carbonyl functional group (in yellow)‚ bears a hydroxyl (OH) functional group (in green). Polyhydroxy aldehydes and ketones with the same number of carbons are structural isomers of each other. CH. Generally‚ Carbohydrates
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