List the procedural steps, from start to finish, that are required to convert dibenzyl ketone and benzil into tetraphenylcyclopentadienone.
1) equip round bottom flask with air condenser
2) add solution of dibenzyl ketone and benzil in ethanol to the flask/condenser assembly
3) warm the flask on a steam bath
4) add a pre-prepared solution of ethanolic KOH into reaction mix, slowly down the condenser
5) heat the purple reaction mix under reflux for 15 mins
6) cool the reaction flask in an ice bath
7) collect purple crystals by vacuum filtration