Originally Posted by vileoxidation
Yeah...I've gotta back up Coelho here...chlorophyll is simply a pigment, and has nothing to do with chloroform or, for that matter, much else that you mentioned. It's name does not reflect that it has chlorine in it, like chloroform, though I can see how one might think it - rather, it name refers to the fact that in Greek, the prefix chloro- means green, which is what color pigment it is.
Chlorophyll being released, and hence the weed changing color, may be a sign of breakup/transfer/etc., but it certainly does not have any effect on the process. It does not "allow" for anything - the only thing it might do, and I am even skeptical about this, is to act as a sign that transfer has happened.
Chloroform is so named due to the fact that it contains chlorine, and has absolutely NOTHING to do with chlorophyll, pigment, plants, or anything of that sort.