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- What diene and dienophile would you employ in the s Diene: H3C CH2 X H₂C CH2 OMe OMeChoose the correct product for the following Diels-Alder reaction. A B H product H D EWhich of the following dienes would you expect to react the fastest in a Diels-Alder reaction? CN ooo & 2 1 3 5 OCH 3 CHO 5.00 CHO 6
- 2. Hemoglobin is a protein in red blood cells that contains iron and facilitates the transport of oxygen. The iron sits in the center of a heme ring in the form of Fe²+. The structure of a heme ring is here. H-C H-C H I H-C H H I C-N H-N-C C I C H C-N-H N-C C-H 1 C-H C-H H H a) The above structure is incomplete. Add electron pairs, non-zero formal charges, and/or additional bonds where needed to fulfill the octet rule to complete the structure. b) When Fe²+ is added to the structure in part a), the H atoms connected to the N are removed, see figure on the right. If you think of the heme ring as 4 N atoms, determine the molecular geometry of the new structure (you can draw it like [FeN4]2+). Imagine each N connects to Fe with a single bond. N- N Fe²+-N N4 Complete the figure below G A H Jones H₂ Pd-BaSO4 Ph3P=CHCOOCH3 F H B SOCI₂ DCC CN OH COOH C E COOH OH COOHFill in the blank with either cumulated, conjugated, or isolated. a Compound a is a diene. Compound b is a diene. Compound c is a diene. The most stable compound is the diene.
- 1) Which diene can undergo Diels-Alder reaction? gj d)4. Choose the compound that could be a product of this Heck reaction. (D represents isotope ²H, deuterium.) H Oll + D Pd(PPH3)2 H 0 ? A B C go po po H D E FDetermine the starting materials to form the following Diels-Alder products: 4 COOH OCH₂ OCH₂ CH₂ CN & CN CH₂