Open ChemDraw: Launch ChemDraw 22.2.0 on your computer.
Draw the C70 Fullerene: Manually Drawing C70 Fullerene: Use the "Polygon" tool to draw a hexagon. Select the hexagon and copy-paste it multiple times to create a larger network of hexagons and pentagons mimicking the structure of C70. This step can be tedious and may require referencing the actual structure of C70 fullerene. Using an External Resource: Search for a structure file of C70 fullerene online. Websites like PubChem or ChemSpider may have the structure available for download in formats such as .mol or .cdx. Import the file into ChemDraw: Go to File > Open and select the downloaded structure file.
Modify to Create PC70BM: Identify the functional groups and their positions on the C70 structure that need to be modified to form PC70BM. Use the "Bond" and "Atom" tools to add and modify the structure as needed. Add the necessary side chains and functional groups to complete the PC70BM structure.
Saving and Using the Structure: Once the structure is complete, save the file in your desired format by going to File > Save As. You can now use this saved structure for further chemical drawing and analysis.