Acetylene
thingiverse
Acetylene molecule The angles are correct Put 4mm strings in the holes and then glue the parts together. Strings symbolize π bonds I used Slic3r program for print
Download Model from thingiverse
With this file you will be able to print Acetylene with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Acetylene.