According to
this book, SI
2 does not exist. Where did you come up with this reaction?
But how does HI reduce the alcoholic groups??? Is it done by the further dissasociation of HI ---Heat---> H+ + I-
Here's a link that might help explain:
http://designer-drugs.com/pte/12.162.180.114/dcd/chemistry/meth.hi-rp.htmlCan simply Al be employed instead of P???
I don't think so. The paper speaks of the phosphorus being oxidized to phosphoric acids, which Al wouldn't be able to form an analogous acid. For sulfur being used instead, maybe? I have no clue.
As far as your broader interests in organosulfur and organophosphorus chemistry, may I suggest going to your school's library and seeing if they have any books on the subject, or journals? If all else fails, you can always purchase books on the subject.