Organic chemistry

• What Does H₂/Ni₂B Do in Organic Chemistry?
  Hydrogen with nickel boride commonly reduces alkynes to cis alkenes, but the substrate and conditions determine whether reduction stops or continues.
• How Do You Draw (E)-1-Phenyl-1,3-butadiene?
  Draw the four-carbon conjugated diene with phenyl and the remaining carbon chain on opposite sides of C1=C2 to show the E geometry.
• Does PBr3 Convert Alcohols with Inversion of Configuration?
  PBr3 usually converts primary and secondary alcohols to alkyl bromides by an SN2 pathway, giving inversion at a stereogenic carbon.
• Why Is Naphthalene Less Aromatically Stabilized per Ring?
  Naphthalene has more total aromatic stabilization than benzene, but less per ring because its fused rings share a 10-electron pi system.