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Organic chemistry refresheer
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Organic chemistry is the chemistry of carbon compounds. It is the basis of all earthy life and are all very different, by their chemical and physical properties and their structures. With a multitude of carbon compounds existing in this world, there was a need for a way to organize all of them by their characteristics. A few of the many functional groups include alcohol, aldehydes, amines, esters, ethers, and ketones. The substance that seems most interesting is benzoin, which is characterized in two of the functional groups mentioned. It is involved in many different processes and is widely used in foods, mainly baked products.
Benzoin is viewed as off-white crystals, with a slight camphor odor. A camphor smells of vanilla with a slight medicinal scent. The substance's formal hydrocarbon chemical name is 2-Hydroxy-1,2-diphenylethanone. Many other names for Benzoin includes 2-Hydroxy-2 – phenyl acetophenone benzoylphenyl carbinol, and Alpha-hydroxylbenzyl phenyl ketone. The structure for Benzoin is illustrated by Figure 1. The structure includes two benzine rings with multiple bonds, including oxygen and hydrogen, off of them. The molecular formula is C14H12O2 . This chemical is found in two functional groups, the alcohol group and the ketone group.
This chemical, Benzoin, is used in a variety of different ways. One of the main purposes for this compound is to be used as an intermediate for the synthesis of organic compound. The second major purpose for Benzoin is to be a catalyst in photo polymerization. In the photo polymerization, the chemical is used as a photo-initiator. The photo-initiators are commonly used because they can be conducted at low temperatures and easily stopped by simply removing the light source. Photo-in...
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... Portal website: http://www.organic-chemistry.org/namedreactions/ benzoin-condensation.shtm Benzoin. (n.d.). Retrieved January 3, 2014, from Chemical Land 21 website: http://www.chemicalland21.com/specialtychem/finechem/BENZOIN.htm Material Safety Data Sheet: Benzoin MSDS. (2013, May 21). Retrieved January 3,
2014, from Science Lab website: http://www.sciencelab.com/ msds.php?msdsId=9923053 National Center for Biotechnology Information, & U.S. National Library of
Medicine. (n.d.). Benzoin. Retrieved January 3, 2014, from PubChem Compound website: http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=8400
Regional Office for Asia and the Pacific. (2001, January 21). Monograph on
Benzoin. Retrieved January 5, 2014, from FAO Corporate Document Repository website: http://www.fao.org/docrep/005/ac776e/ac776e00.htm
...icted α-methyl-2-naphthalenemethanol. Probably the most obvious clue that corresponded to this secondary alcohol was the seven integrated hydrogens within the aromatic region of 7.5-7.9 ppm. This compound was the only one that had seven hydrogens belonging to naphthalene. The other two secondary alcohols 3-methoxy-α-methylbenzyl alcohol and 4-bromo-α-methylbenzyl alcohol have only four aromatic hydrogens.
The goal of this two week lab was to examine the stereochemistry of the oxidation-reduction interconversion of 4-tert-butylcyclohexanol and 4-tert-butylcyclohexanone. The purpose of first week was to explore the oxidation of an alcohol to a ketone and see how the reduction of the ketone will affect the stereoselectivity. The purpose of first week is to oxidize the alcohol, 4-tert-butylcyclohexanol, to ketone just so that it can be reduced back into the alcohol to see how OH will react. The purpose of second week was to reduce 4-tert-butylcyclohexanol from first week and determine the effect of the product's diastereoselectivity by performing reduction procedures using sodium borohydride The chemicals for this lab are sodium hypochlorite, 4-tert-butylcyclohexanone
The primary goal of this laboratory project was to identify an unknown compound and determine its chemical and physical properties. First the appearance, odor, solubility, and conductivity of the compound were observed and measured so that they could be compared to those of known compounds. Then the cation present in the compound was identified using the flame test. The identity of the anion present in the compound was deduced through a series of chemical tests (Cooper, 2009).
The IR spectrum that was obtained of the white crystals showed several functional groups present in the molecule. The spectrum shows weak sharp peak at 2865 to 2964 cm-1, which is often associated with C-H, sp3 hybridised, stretching in the molecule, peaks in this region often represent a methyl group or CH2 groups. There are also peaks at 1369 cm-1, which is associated with CH3 stretching. There is also C=O stretching at 1767 cm-1, which is a strong peak due to the large dipole created via the large difference in electronegativity of the carbon and the oxygen atom. An anhydride C-O resonates between 1000 and 1300 cm-1 it is a at least two bands. The peak is present in the 13C NMR at 1269 and 1299 cm-1 it is of medium intensity.
A weak peak was at a position between 1600-1620 cm-1 can also be seem in the IR, which was likely to be aromatic C=C functional group that was from two benzene rings attached to alkynes. On the other hand, the IR spectrum of the experimental diphenylacetylene resulted in 4 peaks. The first peak was strong and broad at the position of 3359.26 cm-1, which was most likely to be OH bond. The OH bond appeared in the spectrum because of the residue left from ethanol that was used to clean the product at the end of recrystallization process. It might also be from the water that was trapped in the crystal since the solution was put in ice bath during the recrystallization process. The second peak was weak, but sharp. It was at the position of 3062.93 cm-1, which indicated that C-H (sp2) was presence in the compound. The group was likely from the C-H bonds in the benzene ring attached to the alkyne. The remaining peaks were weak and at positions of 1637.48 and 1599.15 cm-1, respectively. This showed that the compound had aromatic C=C function groups, which was from the benzene rings. Overall, by looking at the functional groups presented in the compound, one can assume that the compound consisted of diphenylacetelene and ethanol or
This week’s lab was the third and final step in a multi-step synthesis reaction. The starting material of this week was benzil and 1,3- diphenylacetone was added along with a strong base, KOH, to form the product tetraphenylcyclopentadienone. The product was confirmed to be tetraphenylcyclopentadienone based of the color of the product, the IR spectrum, and the mechanism of the reaction. The product of the reaction was a dark purple/black color, which corresponds to literature colors of tetraphenylcyclopentadienone. The tetraphenylcyclopentadienone product was a deep purple/black because of its absorption of all light wavelengths. The conjugated aromatic rings in the product create a delocalized pi electron system and the electrons are excited
In a separate beaker, acetone (0.587 mL, 8 mmol) and benzaldehyde (1.63 mL, 16 mmol) were charged with a stir bar and stirred on a magnetic stirrer. The beaker mixture was slowly added to the Erlenmeyer flask and stirred at room temperature for 30 minutes. Every 10 minutes, a small amount of the reaction mixture was spotted on a TLC plate, with an eluent mixture of ethyl acetate (2 mL) and hexanes (8 mL), to monitor the decrease in benzaldehyde via a UV light. When the reaction was complete, it was chilled in an ice bath until the product precipitated, which was then vacuum filtrated. The filter cake was washed with ice-cold 95% ethanol (2 x 10 mL) and 4% acetic acid in 95% ethanol (10 mL). The solid was fluffed and vacuum filtrated for about 15 minutes. The 0.688 g (2.9 mmol, 36.8%, 111.3-112.8 °C) product was analyzed via FTIR and 1H NMR spectroscopies, and the melting point was obtained via
Benzyl bromide, an unknown nucleophile and sodium hydroxide was synthesized to form a benzyl ether product. This product was purified and analyzed to find the unknown in the compound. A condenser and heat reflux was used to prevent reagents from escaping. Then the solid product was vacuum filtered.
Ensure gloves are worn at all times when handling strong acids and bases within the experiment of the preparation of benzocaine. 4-aminobenzoic acid (3.0g, 0.022 moles) was suspended into a dry round-bottomed flask (100cm3) followed by methylated sprits (20 cm3). Taking extra care the concentrated sulphuric acid of (3.0 cm3, 0.031 moles) was added. Immediately after the condenser was fitted on, and the components in the flask were swirled gently to mix components. It should be ensured that the reactants of the concentrated sulphuric acid and the 4-aminobenzoic acid were not clustered in the ground glass joint between the condenser itself and the flask. In order to heat the mixture to a boiling point, a heating mantle was used and then further left for gently refluxing for a constituent time of forty minutes. After the duration of the consistent forty minutes the rou...
The following information will focus on the two substances forensic scientist use to identify and compare matter, whether a material is organic or inorganic. Evidence that will be used in a court trial will depend on the examination that forensic scientist processed in the laboratory. The importance of distinguishing between organic and inorganic material is a necessary step in the criminal justice process. The differences between organic and inorganic will be explained first, next will be to explain the strengths and weaknesses of each, and finally the significance of both as it relates to the justice system. Also, we will focus on soil as it relates to how specific evidence is used in each instance. Now let’s begin by listing the differences.
The first group of chemical compounds to be discussed are terpenes. Terpenes are a very comprehensive group of metabolites which are known to contain essential oils that produces well-known scents in herbs belonging to the Lamiaceae plant family (Scott 2008). These scented compounds are usually found in the trichomes of basil, rosemary, lavender, etc. (Scott 2008). Electron micrograph images of these trichomes can be seen below. According to Keeling & Boltmann (2006), there are about 30 000 known types of terpenes which originated from structures created from terpene synthases. These terpene synthases can be broken up into three groups, monoterpene synthases, sesquiterpene synthases, and diterpene synthases (Keeling &...
As demonstrated in Figure A, the basis for this synthesis comes from reacting methadone nitrile with ethyl magnesium bromide, then with the subsequent hydrolysis the racemic mixture of methadone is derived. In addition to this, the time that the compound is active in binding to neuro-receptors compared to a more well-known opioid, morphine, is up to three and
After the some time, we filter it through a Büchner funnel before it is recrystallized and filtered again. The mass was recorded as it was dry. By adding sodium carbonate, we will now test whether what obtained is benzoic acid or not, because one can observe bobbles if it is an acid. After that we burn it to test if it is aromatic.
More than 45 million chemical compounds are known and the number may increase in million every year, without cheminformatics, the access of these huge amounts of information is very difficult.
Organic chemistry is the study of carbon and its compounds (Alcin). Carbon is less than one percent of all matter.Carbon is part of every living thing (Gangson). Carbon makes up eighteen percent of all the matter in living things. (Alcin). The average human body has about 16 kilograms of carbon in some form of this element. Carbon is a part of DNA and proteins. (Robertson).