Anti-Markovnikov Addition Defintiion

Anti-Markovnikov Addition Defintiion Markovnikovs Rule describes the nature of alkene addition reactions in organic chemistry. Russian chemist Vladimir Markovnikov formulated the rule in 1865 after noting the halogen atom preferred the more substituted carbon in a hydrohalogenation reaction with an asymmetric alkene. If a reaction follows the Markovnikov Rule: The nucleophile adds to the more substituted pi-bound carbon.Hydrogen adds to the less substituted carbon. Another way to think of it is that the hydrogen rich get richer, meaning that out of two pi-bound carbon atoms, the one that has the most hydrogen atoms will get another hydrogen in the reaction. But, some reactions dont follow this rule... Anti-Markovnikov Addition Definition Anti-Markovnikov addition is an addition reaction between an electrophile compound HX and either an alkene or alkyne where the hydrogen atom of HX bonds to the carbon atom with the least number of hydrogen atoms in the initial alkene double bond  or alkyne triple bond  and the X bonds to the other carbon atom. The anti part of Anti-Markovnikov addition is that the reaction fails to follow Markovnikovs Rule. It does not refer to anti in terms of stereochemistry! The image shows the Anti-Markovnikov addition of HX to a propene alkene. The H bonds to the CH1 end and the X bonds to the CH2 end of the former double bond. References Hughes, Peter (2006). Was Markovnikovs Rule an Inspired Guess?.  Journal of Chemical Education.  83  (8): 1152.McMurry, John. Section 7.8: Orientation of Electrophilic Ractions: Markovnikovs Rule.  Organic Chemistry  (8th ed.).W. Markownikoff (1870). Ueber die Abhngigkeit der verschiedenen Vertretbarkeit des Radicalwasserstoffs in den isomeren Buttersuren.  Annalen der Pharmacie.  153  (1): 228–59.

Con qué frecuencia los turistas pueden ingresar a EE.UU

Con quà © frecuencia los turistas pueden ingresar a EE.UU Una de las dudas ms comunes  de los turistas que viajan a Estados Unidos es que no saben la frecuencia con la que pueden ingresar al paà ­s. Esta incertidumbre aplica tanto a los extranjeros que viajan con una visa de turista, conocida tambià ©n como de paseo, placer, B2 o B1/B2, como aquellos que pueden ingresar sin visa por pertenecer a un paà ­s del Programa de Exencià ³n de Visados o a los mexicanos que residen a lo largo de la frontera y utilizan una visa lser, tambià ©n conocida como de cruce. En este artà ­culo se informa sobre quà © dice la ley sobre la frecuencia de ingresos asà ­ como las posibles consecuencias. Asimismo, al final, se hace referencia a otros problemas relacionados con este asunto: tiempo mximo permitido de presencia, posibles extensiones y castigos por no respetarlo.  ¿Con quà © frecuencia puede un turista ingresar a EE.UU.? No hay ninguna ley o normativa que especifique cunto tiempo un turista extranjero tiene que permanecer fuera de Estados Unidos antes de regresar. Pero si se quieren evitar problemas conviene tener presente que para ingresar como turista el fin es precisamente ese o recibir tratamiento mà ©dico. Si el oficial del control migratorio tiene conocimiento o meramente una sospecha de que la finalidad del ingreso es otra distinta, habr problemas con absoluta seguridad. Por ejemplo, si sospecha que detrs de visitas muy seguidas est el hecho de que se est buscando trabajo lo cual no est permitido por las leyes migratorias o, incluso, de que ya se est trabajando sin documentacià ³n que lo autorice. Tambià ©n se puede sospechar que la persona extranjera est estudiando dentro de EE.UU. sin visa de estudiante. Otra sospecha frecuente es que el oficial migratorio puede pensar que detrs de ingresos muy frecuentes est el hecho de que se est conviviendo con un familiar o una pareja sin tener una tarjeta de residencia permanente. Obviamente, habr personas que por sus circunstancias personales no sern sospechosas. Por ejemplo, tienen un gran capital y entran y salen de EEUU frecuentemente para simplemente comprar, etc. Pero otras sà ­ que llamarn la atencià ³n y harn que el inspector de Inmigracià ³n se pregunte:  ¿tiene dinero suficiente para pagarse unas vacaciones tan largas?,  ¿ha dejado de trabajar o de estudiar en su paà ­s de origen y por eso pasa temporadas tan grandes en EEUU? Y,  ¿estar buscando trabajo, etc.?  ¿Quà © sucede si se sospecha de las intenciones de un turista? Lo cierto es que pueden suceder varias situaciones. En primer lugar, el inspector de Inmigracià ³n le impide el ingreso, bien permitiendo una retirada de la intencià ³n de entrar a EEUU o bien mediante una expulsià ³n inmediata. Es muy importante entender quà © realmente pasà ³ en el paso migratorio, ya que los efectos entre una retirada y una expulsià ³n son muy diferentes. Si en el  control migratorio escriben I-275 en el pasaporte, es importante conocer las consecuencias. En segundo lugar, es posible que el oficial migratorio envà ­e al turista a una segunda inspeccià ³n, en otras palabras, el famoso cuartito. Destacar que en el paso migratorio no aplican las protecciones constitucionales de los Estados Unidos. Los extranjeros no tienen derecho a un abogado y las autoridades puedne acceder a sus computadoras y telà ©fonos celulares. En tercer lugar, puede que permitan al turista ingresar, pero la sospecha sobre quà © hay detrs de ingresos tan frecuentes puede saltar en  el momento en que toca renovar la visa. En ese momento consulado probablemente va a negar la peticià ³n. Es imprescindible tener claro que tanto el oficial del paso migratorio al llegar a EE.UU. como el del consulado puede negar o revocar/cancelar una visa basndose tan sà ³lo en la sospecha de que no se cumplen los requisitos para la visa o de la finalidad del viaje a Estados Unidos. Ni aduanas y consulado deben probar nada. Otros problemas migratorios de los turistas Relacionado con el tema de la frecuencia de los ingresos est el de cunto tiempo se puede permanecer legalmente en EE.UU. Si se tiene visa de turista, el fijado en el I-94, tambià ©n conocido como documento de registro de ingreso o salida. Con visa de turista se puede solicitar una extensià ³n, si se cumplen los requisitos. Si se ingresa con una visa lser, el establecido por las reglas de à ©sta. Y si se ingresa sin visa por ser de un paà ­s del Programa de Exencià ³n de visados el tiempo mximo de la estadà ­a es de 90 dà ­as, los cuales no pueden extenderse bajo ninguna circunstancia. Si no se respetan los tiempos mximos de estadà ­a, el turista se convierte en un extranjero indocumentado, con todos los problemas que eso conlleva. Adems, su visa se cancela y los que ingresaron sin visa ya no podrn acogerse a los privilegios de ese programa en el futuro. Otro problema recurrente de los turistas es que algunos utilizan su presencia en EE.UU. para un fin no autorizado. Si se descubre, tendrn problemas migratorios serios. En esta categorà ­a se incluyen circunstancias como ingresar como turista e inmediatamente casarse con un ciudadano y pedir arreglar los papeles, aunque el matrimonio sea real, ya que se considera que es un fraude ya que se pidià ³ el ingreso como turista. De interà ©s para turistas extranjeros en Estados Unidos Estados Unidos es el segundo paà ­s del mundo que recibe ms turistas internacionales, solo despuà ©s de Francia. Estas son  las 10 atracciones ms visitadas de Estados Unidos.   Finalmente  en muchas ocasiones los problemas surgen, simplemente, de la ignorancia, del no saber. Para ello se propone este test de 12 preguntas sobre la visa de turista con explicacià ³n de sus respuestas correctas que ayudar a sacarla, conservarla y renovarla.  ¡Demuestren cunto saben! Este es un artà ­culo informativo. No es asesorà ­a legal.

The Scarlet Letter Questions for Discussion

The Scarlet Letter Questions for Discussion The Scarlet Letter is a seminal work of American literature written by New Englander Nathaniel Hawthorne and published in 1850. It tells the story of Hester Prynne, a seamstress newly arrived in the New World from England, whose husband, Roger Chillingworth, is presumed dead. She and local pastor Arthur Dimmesdale have a romantic interlude, and Hester gives birth to their daughter, Pearl. Hester is  convicted of adultery, a serious crime in the time period of the book, and sentenced to wear the scarlet letter A on her clothing for the rest of her life. Hawthorne wrote The Scarlet Letter more than a century after the events in the novel would have occurred, but it is not difficult to discern his contempt for Bostons Puritans and their rigid religious views. Questions for Discussion Consider the following questions as you learn about  The Scarlet Letter.  Whether youre studying for an exam or leading a book club, these discussion questions will strengthen your understanding of the novel. What is significant about the novels title?The Scarlet Letter is considered a romance by many literary scholars. Do you think that is an accurate categorization? Why or why not?Is Hester Prynne an admirable character? Why or why not?How does Hester evolve through the course of the story?How do we learn the true character of Roger Chillingworth? Is he believable as a villain?Is Arthur Dimmesdale an admirable character? How would you describe him and his relationship with Hester?What does Pearl symbolize? How is her name significant?What is the significance of Pearl not recognizing Hester without her scarlet A?What is the moral statement Hawthorne is making throughout The Scarlet Letter?Do you agree with what how Hawthorne interprets the shortcomings of Puritan society?What are some symbols in The Scarlet Letter? How do they relate to the plot and characters?Does the story end the way you expected? Whats significant about the novels ending?Would you consider The Scarlet Letter to be a work of feminist literature? Why or why not?   How essential are the settings, both geographical and temporal, to the story? Could the story have taken place anywhere else or in any other time period?Does this novel give you a better appreciation for how women were treated in early New England? Does it give you a new perspective on other events from that regions history, such as the Salem Witch Trials?

Mean Street movie analysis Review Example | Topics and Well Written Essays - 500 words

Mean Street analysis - Movie Review Example Cassavetes showed his girlfriend called Sandy Weintraub, the field and as a result decided to provide extra sage advice dubbed tone the God-disturbing angst and introduce more tales from the neighborhood (Braund Para 1). The movie is a basically about a small time wise individual called Charlie who was tormented by Catholic guilt. Other tormentors were his loose-canon best pal Johnny Boy and the coterie of cronies, was written by Scorsese and Martin Mardik travelling along the streets of little Italy in the Battered Valiant of Martin. Soaking up the recognizable pageant with fresh sight, they writers got a real taste of little Italy. Also, it spiced up the narrative with cases drawn from Scorsese’s rich background of tales (Braund Para 2). It is prudent to point out that the main pleasure obtained by reviewing the movie Mean Streets is the performance of De Niro. An eruption of casual mayhem and random violence depicts Johny Boy as an excellent reflection of fatal carelessness, a species of heedless fanatic whom cannot be doubted to cheerfully treat welching with debts to local loan offices as if it were some form of extreme sport. De Niro inventing without a net and free from thoughtful brooding that marks his future roles invests him with similar parts troubles and irresistible charm. De Niro shoulders the film manfully, but as the tool for Scorsese’s religious musings when they cross the boundary from heavy to heavy-handed, it makes people to lose patience (Braund Para 3). A significant part of the movie is characterized by documentary feel, however just like some hellish bordello, the movie is like a diabolical glow bathing everything and everyone in shades of carnal red. Such a symbolism is stunning and infinitely more relevant than Keitel sticking his hand in the closest flaming object every moment a stripper shakes before him. Scorsese’s little hood has long disappeared. It is three small

How does stock price and dividends reflect the value of the firm Term Paper

How does stock price and dividends reflect the value of the firm - Term Paper Example For example, if a corporation issues 100 shares in total, each share provides 1% ownership to the shareholder in the company. Share prices can increase or decrease based on the market conditions and the performances of the company. Corporations often keep certain percentage of its annual profits for future expansion of the company and pay certain percentage of the profits to its shareholders. The annual profit paid to the shareholders by the company is often referred as dividends. The amount of dividend supplied to the shareholders in a particular year depends on the profit achieved by the company in that particular year. In other words, when the company gets more profits, the shareholders get more dividends and vice versa. This paper analyses the importance of stock price and dividends with respect to the value of the firm. â€Å"A company's worth - its total value - is its market capitalization, and it is represented by the company's stock price. Market cap is equal to the stock p rice multiplied by the number of shares outstanding† (What is a company's worth, and who determines its stock price?, 2011). When the company grows or performs well, its share prices will increase whereas when the company underperforms, its share prices will decreases. When a company shows signs of growth, more demand will be created in the share market for its shares. Share purchasers often offer higher prices to the shares of growing companies and the shareholders who sell their share or stake in a growing company may get higher prices in the share market. â€Å"A company’s value for many investors is its ability to generate a satisfactory return over a long holding period. A number of things including financial strength, market dominance, growth potential, and so on, determines that value† (Little, 2011). For example, recently, the share value of many companies dropped drastically because of global financial crisis; however the share value of many other compan ies did not undergo many fluctuations as a result of the recent crisis. The companies which performed better in share market even in the crisis situations are generally perceived as better companies and the investors may invest more heavily in those shares. The share prices of better performing companies may not dip drastically even in unfavorable market conditions. In short, share price of a company is directly proportional to the growth of the company; when the company grows, the share prices will increase and when the company underperforms, share prices will decrease. Since dividend is a portion of annual profit made by a company, no company would be able to pay dividends to the shareholders when it underperforms. At the same time, it is not necessary that a company which is able to pay higher dividends is better than some other companies which are paying fewer dividends or no dividends at all. The value of the company can be better judged based on its operations or activities. O nly by generating more cash than it needs to finance its operating plan, should a company pay a dividend. Thus, for a company like Google with attractive growth opportunities, dividends are basically irrelevant to estimate its value. For mature companies, late in their life-cycle, paying dividends is a way to ensure management does not waste funds on silly projects, or build empires. Further, when a company is relatively mature, and it establishes a well-communicated dividend program, it attracts a particular investor

Recommendations on Canadian government in response to climate change Essay

Recommendations on Canadian government in response to climate change - Essay Example Emission of other pollutants leads to environmental degradation and becomes progressively more and more severe, if not checked in time. Unregulated emission and sewage results in global warming; people’s health notwithstanding, it can cause plant and animal extinction also. It is thus incumbent on Canada and other countries to take appropriate action in tackling the various pollutants seriously and urgently. Damages caused by pollution are not likely to have any discernible impact on people’s current lives within ten years, it is being hoped. One can never be too sure whether the future generation will be able to enjoy the quality of life as people currently do in the next fifty years. In order to reduce the overall environmental damages, Canadian government could issue a set of policies that control firms’ emissions and protect the environment. In most countries, there is a missing market of production externalities which implies that firms’ marginal private cost (MPC) is lower than their marginal social cost (MSC). The difference between MPC and MSC thus becomes a burden to the society which induces social inefficiency and overconsumption (Pettinger, 2013). A balance therefore needs to be struck by the Government to exercise control over emissions by offsetting against this cost. Canadian government could cease the production of heavily (high carbon) polluting firms. For less polluting firms, Canadian government could set a carbon tax to internalize the externalities. The introduction of carbon tax will shift up the MPC curve to MSC by a tax per unit, forcing the emission generators to pay themselves for their deeds. A carbon tax therefore increases the relative price of carbon-intensive goods though it is very hard to set. The Government should attempt to phase the tax in, by giving the consumer and manufacturer a buffer zone for self-regulation;

Reference Citation Worksheet Essay Example | Topics and Well Written Essays - 250 words

Reference Citation Worksheet - Essay Example you need assistance completing this worksheet please visit the Center for Writing Excellence within the University Library where you will find numerous Writing & Style Guidelines as well as the Reference and Citation Generator. 1. The paragraph below is an excerpt from the Principled Autonomy and Plagiarism article. Please extract a sentence from the paragraph and create a direct quote and proper in-text citation in the space provided below the paragraph. Every semester, professors grapple with the possibility that the assignments submitted by their students have been plagiarized. The question all professors face is whether they are obligated to check for plagiarized papers. Even with the help of Google and turnitin.com, checking for plagiarized papers is an often-odious task. It is time-consuming. It can take hours to find one plagiarized paper, especially if the professor is manually typing in sentences using Google. Students can slightly alter sentences just e enough to where it is nearly impossible to trace online. It can be emotionally draining for the professor as well. There are papers that seem to have been plagiarized, but there is no solid evidence to corroborate the professor’s suspicion. Some students who are caught plagiarizing aggressively deny any wrongdoing. They file appeals in an attempt to convince a committee that Aristotle actually plagiarized them. â€Å"They file appeals in an attempt to convince a comm ittee that Aristotle actually plagiarized them† (Rosenberg, 2011). 2. The paragraph below is a second excerpt from the Principled Autonomy and Plagiarism article. Please paraphrase this information in your own words including proper in-text citations in the space provided below the paragraph. 3. One could argue that any professor who checks for plagiarized papers is inveterately untrusting. Should we assume that every student is a potential cheater? Trust indeed forms the foundation for every relationship. The professor/student