Grignard Lab Report free essay sample

In the second part of the experiment, a yield of 99. 85% was obtained for triphenylmethanol. A melting point of 160-162Â °C was also determined. Additionally an IR for triphenylmethanol was taken, and all the major peaks were present. A broad peak at ~3400 cm- indicated an alcohol group present. A peak at ~3100 cm- indicating a C-H bonds in the benzene ring. A peak at ~1400-1500 cm- indicating a C=C bonds in the ring. Introduction: In the first part of the experiment, phenylmagnesium bromide (a Grignard reagent) was prepared from reacting magnesium strips with aqueous bromobenzene in diethyl ether. The reaction is illustrated below: The Grignard reagent formed can then behave as a base or a nucleophile due to the partial charge between the carbanion and the alkyl group. The carbanion from the phenylmagnesium bromide act as a nucleophile and under go nucleophillic addition reaction with the carbonyl group of the benzophenone forming an adduct. We will write a custom essay sample on Grignard Lab Report or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The adduct act as a strong base and protonate the proton from HCl with present of ether forming triphenylmethanol (a tertiary alcohol) The reaction is illustrated below: In the presence of heat during refluxing the Grignard reagent, biphenyl impurity is formed and can be isolated with petroleum ether by extraction. The product can then be further purified through recrystallization method using hot isopropyl alcohol. This is then cooled to room temperature and facilitated with an ice bath. The purified triphenylmethanol can then be vacuum filtered and dry. The reaction mechanism for the two steps described is as followed: The purified product obtained was then tested to confirm the successful synthesizing of triphenylmethanol. Melting point value of 160-162Â °C was determine, which support the correct product synthesized. Furthermore, all major functional groups were present in the IR taken for triphenylmethanol indicating a successful experiment. Procedure: All glassware used in this experiment was oven dried and sterile. A Grignard reagent was produced by reacting ~0. 15 g of magnesium metal, stir vane, 0. 80 mL of bromobenzene (0. 70 mL) and anhydrous diethyl ether (20. 0 mL) mixture in a 20-mL round-bottom flask (reflux apparatus). The apparatus was elevated from the hot plate and heated at 60Â °C for 15 minutes. Brownish-gray solution was observed. The remainder bromobenzene/ether mixture was added to the round bottom flask drop-wise with additional washing of ~2. 0 mL of diethyl ether. Iodine (catalyst) was added to facilitate the reaction. Phenylmagnesium bromide was obtained upon cooling of the solution to room temperature. Benzophenone (1. 09 g) and diethyl ether (2. 0 mL) mixture was then reacted with the Grignard product for 15 minutes. Red solidified adduct was observed. Next HCl (6. 0 mL) was added drop-wise to the adduct; bilayer of triphenylmethanol and inorganic impurities was observed. The mixture was then filtered using the reparatory funnel. The round-bottom flask was washed with additional ether (5. 0 mL) and re-extracted. Sodium sulfate was then added to dry the solution. Aqueous solution was then decanted into an Erlenmeyer flask and evaporated in a hot water bath (50Â °C) with air until oily solid was observed. Hot petroleum ether (3. 0 mL) was added drop-wise to dissolve the by-products and cooled to room temperature. Upon cooling, the crude was then vacuum filtered and collected. Hot Isopropyl alcohol was then added to the crude to initiate recrystallization and then vacuum filtered.

Population Stabilization free essay sample

This essay addresses the issue of population stabilization as a matter of policy in the United States. This essay addresses the overwhelming effects of population growth as a direct result of globalization. As possible solutions, better family planning and national health care programs are suggested. Issues such as education, sex, and race are taken into consideration. In an increasingly expanding global community, one subject above all others, must be addressed in order to secure the progression of the human race as a whole. Population stabilization, although not an immediate concern in the United States, is nonetheless a major threat to our world. Statistics project that the global population will increase at about a quarter of a million people each day for the next twenty years and henceforth one can easily assess the urgency of the situation. The most effective means through which stabilization can be achieved is through the implementation of national strategies geared towards family planning and health care programs. We will write a custom essay sample on Population Stabilization or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page

Women Immigrants from Asia

Asian women is a term that was used to collectively identify females who hailed from Asian countries in the United States. The Asian countries included Japan, China and Korea among others. Some Asian women had come along with their husbands in such of greener pastures, and escape from the battles that were taking place in the Asian continent.Advertising We will write a custom essay sample on Women Immigrants from Asia specifically for you for only $16.05 $11/page Learn More As time moved, more Asians relocated to the US and thus, they flooded the state’s labor market. This is what led to the enactment of Chinese Exclusion Act in 1882. The following paragraphs focus on the issues that lie underneath this act and the effects it had on Asian women. Before the legislation of the exclusion act, Asians were allowed to immigrate to the US as laborers in the sugar farms. There was extreme poverty in Asia, which prompted many locals to seek for employment in the US. The construction of transcontinental railroad caused more Asians to relocate to the US and this is because the local population could not satisfy the demand for labor. The Asian laborers were only interested in earning a living and thus, they took any offer that came their way. This attitude did not go down well with the locals because they felt that the Asians were gradually eliminating them from the labor market. In 19th century, activist groups advocated for the passing of Chinese exclusion act, which many people saw it as the appropriate measure of securing the interests of the local people. When the act was passed in 1882, it barred many Asians from relocating to the US. The other argument that activists used was that Asian women were promoting the spread of prostitution in the US. This was a scapegoat because prostitution started even before the coming of Asian women. Furthermore, the Asian women were perceived to be responsible of infecting the locals with sexually transmitted diseases. After the exclusion act was passed, a lot of racial violence was directed towards Asian women. This brutality was intended to make the Asian women to return to their mother countries and discourage other Asian women from relocating to the US. The exclusion act favored the interests of the locals because they were given the first priority in the labor market. With no alternative, the Asian women resorted to prostitution as a way of earning their daily bread.Advertising Looking for essay on history? Let's see if we can help you! Get your first paper with 15% OFF Learn More However, American men who had drawn Asian women from Asia while posing as potential husbands forcibly converted them some into sex slaves. The girls were promised good life once they agreed to relocate to the US, but were later shocked by the turn of events. Most Asian opted to remain in the US and practice prostitution rather than go back their poor homes. Besides, by working as commercial sex workers they were able to help their friends back at home because the value of US currency was higher in Asia. On the other hand, a few women were immune from the Chinese Exclusion Act. These Asian women were married to the American natives or were born in the United States. The Asian women were stereotyped as prostitutes, but those born in the US were thought to be pure because they had adopted the American lifestyle. However, this initiative did not stop Asian women from immigrating to the US because most of them managed to pose as wives of American businessmen. Similarly, not all Asian women who wished to trade with their bodies, but brothel owners kidnapped even those who were innocent. This is because owning a brothel was a very lucrative business back then. Once in the brothels, they were subjected to many inhumane acts because their feet had to be bound to attract more customers. Therefore, the US law was used to justify racial discrimination towards Asian wom en. The Asian women would not have engaged in prostitution if they were given equal employment opportunities just like their local counterparts. The exclusion law was biased because if it was to be used to eliminate prostitution, then it should have been comprehensive. From another perspective, the exclusion act was trying to imply that prostitution was reserved for local women, but not for foreign women. This essay on Women Immigrants from Asia was written and submitted by user Francesca Garcia to help you with your own studies. You are free to use it for research and reference purposes in order to write your own paper; however, you must cite it accordingly. You can donate your paper here.

The Killer Clown, John Wayne Gacy essays

The Killer Clown, John Wayne Gacy essays Robert Hare is North America's most renowned academic on psychopaths. Utilizing the basis of the components of Hare's theory and his "Psychopath Checklist (PCL) which was later revised to the PCL-R" (Wikipedia, 2013, Hare), it is possible to analyze John Wayne Gacy's criminal career. This checklist has specific scoring criteria rating 20 items on a 3-point scale corresponding to the extent that it applies to a given individual. With the psychopathic behaviours identified by Hare's PCL-R, it can be implied that Gacy would score above 30 on this scale and therefore be considered a Gacy is considered to be America's most coldblooded killer. What the world viewed him as before being arrested and convicted of his heinous acts was a successful businessman; a social pillar in his community; volunteer; an active member of the Jaycee's; an ethical man; a man of stature; a good father and family man. Joining the "Jolly Jokers" in 1975, he created his character "Pogo the Clown" (A in order to attend numerous parties and charitable events. This creation of Pogo is what gave him the name "Killer Clown" by the media and public when As Dr. Michael Stone discusses during the documentary, "Most Evil - Cold Blooded Killers", he places Gacy at level 22 on the scale of measuring evil. The only other serial killer to score this high according to the aforementioned documentary was Tommy Sells (Stone, 2006). Gacy was found guilty and sentenced to death for the murder of 33 teenage boys and young men between 1972 and 1978. The majority of the bodies (25+) were buried in the crawl space of his home at 8213 West Summerside Avenue in Chicago (Decoeur, 1998). He would utilize some of his employees and a former roommate to help dig the "graves" for these victims by enticing them to believing they were digging "drainage lines". Fastidiously ensuring that ...

Case Problems Involving the First Amendment Essay

Case Problems Involving the First Amendment - Essay Example The law gives the United Striates Government the right to release information or refuse to release and grants nine exemptions, which can be applied to stop disclosure of sensitive information (Russomanno 147). When stopping the publication the judge may use the theory of interpretation of the first Amendment Act on the Freedom of speech that deals with content regulation. This states that the government has the right to bar any publisher publishing information that may be viewed as threatening national security. In an example the case of Miami Herald Publishing Co. v. Tornillo, the court found that at times it is important for the federal government to bar release of information that may threaten the national security. When the judge is making the ruling on this case there are several things, he will have to put into consideration. The first one is the perceived effect on national security the release of the report would have and the other is the right of the press to publish information. He will look to see if the press freedom being infringed and if so will allow the information be published. On the other hand, if the information is proven vital and threatening national security he will bar it from being

Social Security's role in our society and public administration Essay

Social Security's role in our society and public administration - Essay Example This Civil War Pension program provided benefits to war veterans with disabilities, in addition, widows and orphans could receive pensions equal to the amount paid to veterans. Starting with the year 1906 old age has become the main qualification for the benefits payment. Thus, by the year 1960 the following groups of people were receiving benefits: Civil War veterans, survivors with disabilities, and the old-aged. Later, these programs would become known as Social Security. In particular, four major demographic changes led to the emergence of Social Security in the early 1930s: the Industrial Revolution, the urbanization of America, the disappearance of the extended family and the market increase in life expectancy. Also, as a result of an Agricultural Revolution the majority of self-employed workers were transformed into industrial working class. When primary income comes from wages, economic security is threatened by recessions, layoffs and business failures, factors that employees have no control over. Industrialization has led to city growth and by 1930 half of the population was living in cities. The trend towards urbanization resulted in the disappearance of the extended family. This was due to large families living in the same residence. The major advantage of an extended family was that when one member became too old too work, the other members assumed responsibility for his well-being. Urbanization limited this kind of support and many old peo ple appeared behind the line of poverty. Finally, due to improved healthcare and sanitation Americans began to live significantly longer. The net result from these demographic changes was that Americans were older, more industrial and fewer people lived in extended families. The existing provisions of economic security were becoming increasingly fragile. The Social Security programs adopted in late 1935 relied on the concept of social insurance common in Europe at that time. The initial aim of the Social Security system was to shift the responsibility for economic security to the governmental institutions. In the late 19th century several European and Latin American states already had some form of the social insurance campaigns. The major points of the American Social Security included old age assistance, unemployment insurance, aid to dependent children and grants to the states to provide medical care (Tanner, 2004). The section on old-age benefits is what people think about Social Security today. Although the American social insurance program has been initiated much later, it was relatively successful compared to the other systems. For example, in the book "Relief and Social Security" Meriam notes the following: " . . . social insurance and the allied services, as they exist today, are conducted by a complex of disconnected adminis trative organs, proceeding on different principles, doing invaluable service but at a cost in money and trouble and anomalous treatment of identical problems for which there is no justification. In a system of social security better on the whole than can be found in almost any other country there are serious deficiencies which call for remedy" (Meriam, 1946, p. 2). Meriam talks about the American Social Security Act of 1935 as one of the most successful. Particularly, she outlines four major benefits this act has offered (Meriam, 1946, p. 16-19): The creation of the Civilian Conservation Corps by the national government

Hamlet Essay Example | Topics and Well Written Essays - 500 words - 15

Hamlet - Essay Example Hamlet dresses badly and Queen Gertrude is displeased by his behaviour and more so because of the demise of his dad and her remarrying. Claudius orders Rosencrantz and Guildenstern to investigate the reasons for his son in law’s unusual behaviour (Shakespeare 41). Hamlet organizes a play The Murder of Gonzalo in which he reveals the ghost’s words to King Claudius of killing his father. The king behaves in a manner to suggest the words are true. Gertrude tries to stop Hamlet, but he reprimands her for remarrying. Hamlet bashes Polonius while listening to the scolding in arrears of the curtains (Shakespeare 86). The flicker resurfaces to Hamlet and instructs him to be gentle to Gertrude. Eventually, the queen ditches King Claudius. Later King Claudius is stunned by the news of Polonius’ demise (Shakespeare 92). The queen, however, defends Hamlet insinuating he is mad. Now scared, the king sends him to England and reveals his plans to kill him while in England (Shakespeare 95). Ophelia goes angry and later on pass away. The King informs Laertes that Hamlet was responsible for the death of his father, and they plan to kill him at a fencing match. During Ophelia’s funeral, Hamlet communicates to Horatio on how he escaped his planned death in England and in its place Rosencrantz as well as Guildenstern died (Shakespeare). Hamlet also says that he wanted to devour King Claudius Killed. The Queen perishes from drinking festering cup predestined for Hamlet (Shakespeare 140). Laertes poisoned sword cuts Hamlet hurdles against Laertes but, while about to die, Hamlet stabs Claudius with Laertes’ sword; instructs Horatio to reveal the story, and recommends Young Fortinbras as Denmark’s next King (Shakespeare line 142). This scene is vital in the play as helps in the establishment of not only the tone of the play but also the background situation of the play setting. This is essential as normally the there