What is the density of lithium metal (in \(\mathrm{g} / \mathrm{cm}^{3}\) ) if a cube measuring \(0.82 \mathrm{~cm} \times 1.45 \mathrm{~cm} \times 1.25 \mathrm{~cm}\) has a mass of 0.794 g?
Text Transcription:
g/cm^3
0.82 cm times 1.45 cm times 1.25 cm
Week 11 Recap Chapter 7 Substitution Reactions SN1 SN2 1. Substitution Reactions: exchange one functional group for another 2. Substrate: the electrophile, contain a leaving group 3. Naming Halogenated Organic Compounds: a. Systematic Name: treats the compound as a haloalkane b. Common Name: treats the compound as an alkyl halide 4. Alpha Position: the carbon atom connected directly to the halogen 5. Beta Position: the carbon atoms connected to the alpha position 6. Alkyl Halides a. Classified as Primary, Secondary, Tertiary: according to the number of alkyl groups connected to the alpha position 7. Concerted Process: nucleophilic attack and loss of leaving group occur simultaneously 8. Stepwise Process: first the leaving group leaves, then the nucleophile attacks 9. SN2: evidence for the concerted mechanism, second-order rate equation, bimolecular a. Methyl halides and Primary halides react most quickly, tertiary alkyl halides are essentially unreactive toward SN2 b. When the Alpha Position is a Chirality Center, reaction proceeds with Inversion of Configuration c. Preference: Back-Side Attack: stems from the need for constructive overlap of orbitals (according to MO Theory) d. Stereospecific: b/c the configuration of the product is determined by the configuration of the substrate e. Proton Transfer at beginning of mechanism if
