English to Dutch Tech/Engineering Chemistry; Chem Sci/Eng patent application

context: "In a preferred embodiment, R4 is an alkanediyl, most preferably a linear alkanediyl with 2-24 carbon atoms."

Hoe heet zo'n ding in het Nederlands?

see also: https://en.wikipedia.org/wiki/Substituent

"For multiple bonds of the same type, which link the substituent to the parent group, the infixes -di-, -tri-, -tetra-, etc., are used: -diyl (two single bonds), -triyl (three single bonds), -tetrayl (four single bonds), -diylidene (two double bonds).

For multiple bonds of different types, multiple suffixes are added: -ylylidene (one single and one double), -ylylidyne (one single and one triple), -diylylidene (two single and one double)."