Posted by Dr. O. on October 15, 1998 at 18:10:13:
In Reply to: Pchem lab: p? in Nb=p+3 posted by April on October 15, 1998 at 15:39:50:
: Does p=total carbon atoms in molecule, because in the book it says p=carbon atoms in polymethine chain. What is the polymethine chain?
p refers to the number of carbons in the conjugated part of the molecule.
These dyes are considered poymethine dyes with the 2 nitrogens separated
by a conjugated chain of carbons that can have different lengths.
Dr. O.