I am synthesizing new polymer that has not been reported before. The structure of the polymer is based on indacenodithienothiophene unit and thiophene. I used Stille polymerization. As monomers, I used distannyl-indacenodithienothiophene unit and 2,5-dibromothiophene. 2,5-dibromothiophene has bul...

In most of Japanese high-school textbook it is written that Al,Zn,Sn and Pb are amphoteric element(in Japanese 両性元素）because they react both with strong acid and base. For example Al reacts like below. $\ce{2Al +2NaOH +6H2O->2Na[Al(OH)4] +3H2}$ $\ce{2Al + 6HCl-> 2AlCl3 + 3H2}$ It is true that thes...

I'm curious if there are any aromatic systems that don't contain any rings. I just wonder and want to know if there is any exception to the aromatic system. I know the definition of aromaticity is that it must have a ring but my friend told me there are some aromatic molecules that don't have a r...