Taking the cognizance of the fact that 1o
alcohols, 2o
alcohols and aldehydes that are
synthesized through Grignard reagents, and hence displayed in SDo, may even have connections
with one and other i.e. 1o
alcohol can be converted to aldehyde which can in turn be interlinked
with 2o
alcohol’s synthesis. All the possible synthetic routes are discussed in the class room and
after the recognition of various chemical relations systemic diagram SD0 can be improved by
students into another systemic diagram SD1. In view of discussions SDo is altered to SD1 by
placing single headed arrows in place of doubled headed ones and also bringing tick marks to
replace the question marks where ever inter linkages get grasped by the students. Thus some
question marks disappear from the display diagram SDo as shown in figure 3