Subject - Organic ChemistryThe Diels-Alder reaction combines a 1,3-diene with an alkene (dienophile) to form a cyclohexene derivative. Alkenes react particularly easily - as & 34; good dienophiles & 34; so to speak - with electron-withdrawing substituents such as maleic anhydride. Instead of the alkenes, it is also possible to use alkynes or compounds with heteroelement multiple bonds such as e.g.
Did you complete the learning unit Introduction to Wave Optics and are you looking for further material? Then we recommend the following learning units: Double slit experiments 60 min. Physics Optics Wave optics This learning unit is about getting to know interference as an important characteristic of light waves.
Do you have problems understanding the learning unit impact-resistant polystyrene? Then you may be missing the following basics: Polystyrene30 min.ChemistryTechnical chemistryProduction technologyThe module gives an insight into the discovery and use of polystyrene. Technical production processes for polystyrene (PS) are presented.
Function of the ABC-ATPasesABC-ATPases are one of the largest and most highly conserved families of molecules; their representatives are found in abundance in all organisms. Their name comes from the ATP-binding cassette (ABC), an ATP binding and hydrolysis site that is essential for the function of these molecules.
Example 2 First, the change in the pH value of an acetic acid / acetate buffer with 1 molL-1 HAc and Ac− with the addition of 0.1 molL-1 HCl0.1 molL-1 NaOH is to be calculated. The pH of the buffer before the addition is 4.75 because HAc = A− .pH = pKa + lg (A- HA) The added hydrochloric acid converts the equivalent amount of acetate into acetic acid: pH = 4.75 + lg (Ac - - HCl HAc + HCl) pH = 4.75 + lg (1−0.11 + 0.1) pH = 4.66 ⇒ ΔpH = −0.09 The added sodium hydroxide forms the equivalent amount of acetate from acetic acid.
Exercise Fig. 1 Which isomer is shown here in the Fischer projection? Please make a selection.Please make a selection.correctfincalpartially correctThis is the correct answerResetEvaluateShow the solution