1 The Diels-Alder reaction is a conjugate addition reaction of a conjugated diene to an alkene (the dienophile) to produce a cyclohexene. 2  The simplest example is the reaction of 1,3-butadiene with ethene to form cyclohexene:3  The analogous reaction of 1,3-butadiene with ethyne to form 1,4-cyclohexadiene is also known: Due to the high degree of regio-and stereoselectivity (due to the concerted mechanism), the Diels-Alder reaction is a very powerful reaction and is widely used in synthetic organic chemistry.
Best Answer: Buyers have up 7 days to pay for an item before you as a seller can open an unpaid item case with ebay. They have a whole process they ask that sellers follow: Buyers automatically enter into a legally binding contract to purchase the item from the seller if they win an online auction or use the Buy It Now feature.
Generally you should be riding pretty by April 1. At least that's the goal of most auto insurers -- to have your claim paid out on or before the 30-day mark. Of course, there's no certainty your vehicle will be repaired by then. But auto insurance rules are made to be broken.The time limit to pay your claim varies by state, according to each state's claims settlement provisions.. In Connecticut, paying promptly is the vague term used, which describes a payment within 30 days, and only if it is an undisputed clean claim. Check your rental car coverage. 2  Most policies only provide coverage for 30 days. 3  Find out your state's law for paying a claim. 4  If you suspect your insurance company is violating the Unfair Claims Settlement Act, talk to your adjuster's supervisor.