We only worry about carbon atoms. Rule #1-Name the longest chain that contains both double bonds. End it with "diene". Rule #2-When necessary use the lowest numbers to give the locations of both double bonds.

What are Dienes used for?

Dienes are wooden or plasticcubes, rods and flats used to support children basic maths. Dienes are used by students when learning mathematical concepts such as addition, subtraction, number sense and place value. Dienes are also called base ten blocks or multi-base arithmetic blocks.

Why are Dienes blocks good?

The advantage of Dienes blocks is that they can easily represent larger numbers when compared to other manipulatives such as counters. MAB base ten blocks allow children to see how ten unit blocks in the units column can be replaced with one ten rod, which we can then move into the tens column.