Organic Compounds - Free Essay Example

Sample details Pages: 3 Words: 996 Downloads: 6 Date added: 2017/09/16 Category Biology Essay Type Argumentative essay Did you like this example? Organic compound From Wikipedia, the free encyclopedia Jump to: navigation, search Methane is one of the simplest organic compoundsAn organic compound is any member of a large class of chemical compounds whose molecules contain carbon. For historical reasons discussed below, a few types of carbon-containing compounds such as carbonates, simple oxides of carbon and cyanides, as well as the allotropes of carbon such as diamond and graphite, are considered inorganic. The distinction between organic and inorganic carbon compounds, while useful in organizing the vast subject of chemistry s somewhat arbitrary. [1] Organic chemistry is the science concerned with all aspects of organic compounds. Organic synthesis is the methodology of their preparation. Contents [hide] 1 History 1. 1 Vitalism 1. 2 Modern classification 2 Classification 2. 1 Natural compounds 2. 2 Synthetic compounds 3 Nomenclature 4 Databases 5 Structure determination 6 See also 7 References 8 External links [edit] History [edit] Vitalism The name organic is historical, dating back to the 1st century. [citation needed] For many centuries, Western alchemists believed in vitalism. This is the theory that certain compounds could only be synthesized from their classical elements — Earth, Water, Air and Fire — by action of a life-force (vis vitalis) possessed only by organisms. Vitalism taught that these organic compounds were fundamentally different from the inorganic compounds that could be obtained from the elements by chemical manipulation. Vitalism survived for a while even after the rise of modern atomic theory and the replacement of the Aristotelian elements by those we know today. It first came under question in 1824, when Friedrich Wohler synthesized oxalic acid, a compound known to occur only in living organisms, from cyanogen. [citation needed] A more decisive experiment was Wohlers 1828 synthesis of urea from the inorganic salts potassium cyanate and ammonium sulfate . Urea had long been considered to be an organic compound as it was known to occur only in the urine of living organisms. Wohlers experiments were followed by many others, where increasingly complex organic substances were produced from inorganic ones without the involvement of any living organism. citation needed] [edit] Modern classification Even after vitalism had been disproved, the distinction between organic and inorganic compounds has been retained through the present. The modern meaning of organic compound is any one of them that contains a significant amount of carbon even though many of the organic compounds known today have no connection whatsoever with any substance found in living organisms. There is no official definition of an organic compound. Some text books define an organic compound as one containing one or more C-H bonds; others include C-C bonds in the definition. Others state that if a molecule contains carbon it is organic. [2] Even the broader definition of carbon-containing molecules requires the exclusion of carbon-containing alloys (including steel), a relatively small number of carbon-containing compounds such as metal carbonates and carbonyls, simple oxides of carbon and cyanides, as well as the allotropes of carbon and simple carbon halides and sulfides, which are usually considered to be inorganic. The C-H definition excludes compounds which are historically and practically considered to be organic. Neither urea nor oxalic acid are organic by this definition, yet they were two key compounds in the vitalism debate. The IUPAC Blue Book on organic nomenclature specifically mentions urea[3] and oxalic acid. [4] Other compounds lacking C-H bonds that are also traditionally considered to be organic include benzenehexol, mesoxalic acid, and carbon tetrachloride. Mellitic acid, which contains no C-H bonds, is considered to be a possible organic substance in Martian soil. All do, however, contain C-C bonds. [5] The C-H bond only rule also leads to somewhat arbitrary divisions in sets of carbon-fluorine compounds, as for example Teflon is considered by this rule inorganic but Tefzel organic; similarly many Halons are considered inorganic while the rest are organic. For these and other reasons, most sources consider C-H compounds to be only a subset of organic compounds. To summarize: Most carbon-containing compounds are organic, and most compounds with a C-H bond are organic. Not all organic compounds necessarily contain C-H bonds (e. g. urea). [edit] Classification See Classification of organic compounds Organic compounds may be classified in a variety of ways. One major distinction is between natural and synthetic compounds. Organic compounds can also be classified or subdivided by the presence of heteroatoms, e. g. organometallic compounds which feature bonds between carbon and a metal, and organophosphorus compounds which feature bonds between carbon and a phosphorus. Another distinction, based upon the size of organic compounds, distinguishes between small molecules and polymers. [edit] Natural compounds Natural compounds refer to those that are produced by plants or animals. Many of these are still extracted from natural sources because they would be far too expensive to be produced artificially. Examples include most sugars, some alkaloids and terpenoids, certain nutrients such as vitamin B12, and in general, those natural products with large or stereoisometrically complicated molecules present in reasonable concentrations in living organisms. Further compounds of prime importance in biochemistry are antigens, carbohydrates, enzymes, hormones, lipids and fatty acids, neurotransmitters, nucleic acids, proteins, peptides and amino acids, lectins, vitamins and fats and oils. edit] Synthetic compounds Compounds that are prepared by reaction of other compounds are referred to as synthetic. They may be either compounds that already are found in plants or animals (semi synthetic compounds), or those that do not occur naturally. Most polymers (a category which includes all plastics and rubbers), are organic compounds. [edit] Nomenclature The IUPAC nomenclature of organic compounds slightly differs from the CAS nomenclature. [edit] Databases The CAS database is the most comprehensive repository for data on organic compounds. The search tool SciFinder is offered. The Beilstein database contains information on 9. 8 million substances, covers the scientific literature from 1771 to the present, and is today accessible via CrossFire. Structures and a large diversity of physical and chemical properties is available for each substance, with reference to original literature. PubChem contains 18. 4 million entries on compounds and especially covers the field of medicinal chemistry. There is a great number of more specialized databases for diverse branches of organic chemistry. [edit] Structure determination Don’t waste time! Our writers will create an original "Organic Compounds" essay for you Create order

The Lottery by Shirley Jackson Essay - 1410 Words

â€Å"The lottery† ENGL 202: Literature and Composition Spring 2013 Turbian Style Thesis: Death is the main theme of both short stories and both authors portrayed this dark and dreary idea as a game the characters are playing. Outline: â€Å"The Lottery† by Shirley Jackson vs. â€Å"The Most Dangerous Game† by Richard Connell I. Introduction: a. Traditional acts and survival instincts is the key to win or lose the game of death b. Will one allow society or your own reasoning decided if one survives the game of death c. The battle of death is the game that no one knows the result of until the end II. â€Å"The Lottery† by Shirley Jackson a. Jackson portrayed death as a fun family oriented game b. All people of the village,†¦show more content†¦In both stories, the innocent characters were fighting death at the hands of someone who found the idea of killing another human being to be a game. In â€Å"The Lottery† the game of death consumed an innocent life solely because a few individuals founded a tradition; and in â€Å"The Most Dangerous Game† the game of death consumed an innocent life solely because one person thought it was merely entertaining. Both authors p ortrayed the antagonist as friendly, warm and welcoming. In the Lottery, the antagonists were the families whom participated in the drawing of a name that lead to the stoning of another family member (which may or may not be their own family member). In â€Å"The Most Dangerous Game† the antagonist was a well-off general who opened his luxurious home to guests who have gone astray from their original destination. Death is the main theme of both short stories and both authors portrayed this dark and dreary idea as a game the characters are playing. In â€Å"The Lottery†, Jackson portrayed death as a fun family oriented game. Jackson included children, family, friends and most importantly the tradition of playing â€Å"the lottery† to portray to the audience the commonality of the â€Å"game†. This game, known as â€Å"The Lottery† was an event that each family member of a small village participated in every year during the summer time. The famil ies gathered together in the square around mid-morning getting prepared for the game by the gathering of stones,Show MoreRelatedThe Lottery, By Shirley Jackson1195 Words   |  5 PagesOn the surface, Shirley Jackson’s short story, â€Å"The Lottery,† reads as a work of horror. There is a village that holds an annual lottery where the winner is stoned to death so the village and its people could prosper. Some underlying themes include: the idea that faith and tradition are often followed blindly, and those who veer away from tradition are met with punishment, as well as the idea of a herd mentality and bystander apathy. What the author manages to do successfully is that she actuallyRead MoreThe Lottery by Shirley Jackson757 Words   |  4 Pagessucceed but many fail just like the main character Tessie Hutchinson in Shirley Jackson’s short story â€Å"The Lottery†. When someone hears the word â€Å"lottery†, he or she may think that someone will b e rewarded with prize. But â€Å"The Lottery† By Shirley Jackson is different than what one thinks. In the story, a lottery is going to be conducted not like Mega Million or Powerball one play here. In the story, the person who wins the lottery is stoned to death instead of being rewarded with the prize. TessieRead MoreThe Lottery By Shirley Jackson931 Words   |  4 PagesIn 1948 Shirley Jackson composed the controversial short story â€Å"The Lottery.† Generally speaking, a title such as â€Å"The Lottery† is usually affiliated with an optimistic outlook. However, Jackson’s approach is quite unorthodox and will surely leave readers contemplating the intent of her content. The story exposes a crude, senseless lottery system in which random villagers are murdered amongst their peers. Essentially, the lottery system counteracts as a form of population control, but negatives easilyRead MoreThe Lottery By Shirley Jackson1504 Words   |  7 Pagesâ€Å"Th e Lottery† by Shirley Jackson In The Lottery Shirley Jackson fills her story with many literary elements to mask the evil. The story demonstrates how it is in human nature to blindly follow traditions. Even though some people have no idea why they follow these traditions. The title of the story plays a role in how Shirley Jackson used some literary elements to help mask the evils and develop the story. The title â€Å"The Lottery† serves as an allegory. When people think of the lottery majorityRead More`` The Lottery `` By Shirley Jackson894 Words   |  4 Pagesshort story â€Å"The Lottery†, author Shirley Jackson demonstrates Zimbardo’s concepts in three different areas: Authority figures, Tradition and Superstition, and Loyalty. The first concept Jackson portrays in â€Å"The Lottery† is the authority figures. Jackson indicates that the lottery is being held in the town center by one authority figure, Mr. Summers, annually on June 27th. Every June 27th, without fail, townspeople gather in the town square to participate in the annually lottery even though mostRead MoreThe Lottery, By Shirley Jackson1510 Words   |  7 PagesShirley Jackson’s â€Å"The Lottery† illustrates several aspects of the darker side of human nature. The townspeople in Jackson’s â€Å"The Lottery† unquestioningly adhere to a tradition which seems to have lost its relevance in their lives. The ritual that is the lottery shows how easily and willingly people will give up their free will and suspend their consciences to conform to tradition and people in authority. The same mindless complacency and obedience shown by the villagers in Jackson’s story are seenRead MoreThe Lottery By Shirley Jackson8 11 Words   |  4 Pagesâ€Å"The Lottery† was published by Shirley Jackson. The story was true expression of Jackson’s genuine thoughts about human beings and their heinous competence in an annual village event for corn harvest . First, her used to word symbolized main point of the story. Second, Jackson was inspired by few historical events happened in the past and a life incident in her life. Lastly, She was able to accomplish the connection between historical and biographical with the story. Therefore, Shirley Jackson’sRead MoreThe Lottery By Shirley Jackson934 Words   |  4 Pagesâ€Å"The Lottery† by Shirley Jackson signifies the physical connection between the villagers and their unwillingness to give up their tradition. â€Å"The Lottery† is very unpredictable and quite misleading. The black box has no functionality, except every June 27th. Shirley Jackson depicts the black box as an important and traditional tool. Although the villagers in â€Å"The Lottery† are terrified of the goal of the lottery and the black box, they are unwilling to let go of the tradition. Shirley Jackson portraysRead MoreThe Lottery by Shirley Jackson799 Words   |  4 Pagesthe mood and to foreshadow of things to come. The Lottery by Shirley Jackson is a story in which the setting sets up the reader to think of positive outcomes. However, this description of the setting foreshadows exactly the opposite of what is to come. In addition, the theme that we learn of at the end leads us to think of where the sanity of some human beings lies. The story begins with the establishment of the setting. To begin, Shirley Jackson tells the reader what time of day and what time ofRead MoreThe Lottery by Shirley Jackson1764 Words   |  7 Pagesfilled with excitement and eeriness, leaving the reader speechless. The Lottery , a short story written by famous writer Shirley Jackson, created an uproar on June 26, 1948, when it was published in the magazine The New Yorker (Ball). The gothic thriller, set in an unknown time and place, shares the tradition of a small town, a little larger than three hundred people, in which a drawing is held once a year. In this â€Å"Lottery,† each family’s husband draws a slip of paper from a black box. The husband

Mrs. Rose †The ninth grade task master! Free Essays

The teacher I most remember as a great teacher in my years of schooling would definitely be Mrs. Rose, my 9th grade English teacher.   Mrs. We will write a custom essay sample on Mrs. Rose – The ninth grade task master! or any similar topic only for you Order Now Rose combined the qualities of motivation, skill and content mastery in a way that I still remember today.   As a freshman in high school, I had not been exposed to any terribly difficult courses.   Most of the junior high work I did was simply answering questions or writing reports which did not have to well-cite or even grammatically correct.   I learned quickly that, because I was relatively smart to begin with, I could get away with a minimum of effort and studying. Mrs. Rose changed all that.   On the first day she mentioned the usual information – grading, pop quizzes, class materials and behavior expectations.   I had heard all this before, so I half-listened, planting polite expression on my face while my mind wandered.   Imagine my shock when we had a pop quiz of the first day’s information the very next day!   I did very poorly, to which I was not accustomed.   Worse yet, now my teacher’s first impression of me was that of a slacker.   I had to wake up and work extra hard to pull up that first low quiz grade.   Looking back, I am sure that was precisely her intention for all of us. As the year progressed, we were all subjected to coursework the likes of which simply did not exist in junior high.   We had to learn grammar, diagram sentences, write essay upon essay and read countless novels and plays without the luxury of Cliff’s Notes.   This era was pre-internet study aids!   We tried to complain that we had no foundation for this to which Mrs. Rose replied, â€Å"If that is true, it is neither your fault nor mine.   Unfortunately, we must correct it.† She could blend just the right amount of feeling for my battle with the semi-colon with the rigor of the curriculum itself.   She let my misuse go a couple of times, but on the third incident, I got an ‘F’ for punctuation in my essay.   I was floored and asked her to let me revise it (again).   She said â€Å"no.†Ã‚   From that point on, I have never, to my knowledge, misused a semicolon; however, I find such examples frequently in magazines and newspapers now.   Again, that particular strategy worked wonders for me and all the others in my class.   Her encouragement wasn’t overdone, but I could tell she really wanted me to learn. At times, I would be seized by jealousy when my friends in other classes would laugh at how easy their English class was, how like 8th grade it was, and how they were getting easy ‘A’s.   I had to work hard for my grades and resented their extra free time.   Later, though, I understood the importance of my 9th grade English class and Mrs. Rose.   I did not struggle nearly as much as my peers in upper level high school classes and in college courses where professors were even more demanding.   I firmly believe that Mrs. Rose knew more about grammar and writing than any of them and was grateful that I had a chance to learn from her early on in my education rather than have to suffer later. Mrs. Rose, who I believe has now passed away, was an exemplary teacher.   Try as I might, I could never devise a sentence she could not diagram.   She seemed to take pride in my educational victories, such as my high SAT verbal score and my college acceptance.   As a result, I decided to become a teacher myself and attempt to emulate Mrs. Rose in all that I do in my classes.   I, from experience now, know that Mrs. Rose did not receive any monetary rewards for her commitment to teaching.   In fact, our rewards as teachers are much more internal.   However, I am confident that she knew her influence on me because I told her, as did many other students I knew.   When a student tells me how much I have helped them, I know how she felt then.    How to cite Mrs. Rose – The ninth grade task master!, Essay examples