Phlorin, structure

Chlorexolone as diuretic, 1, 174 Chlorides synthesis, 1, 448 Chlorin, 4, 370 metal chelates, 4, 391 Chlorin, dihydroxy-, 4, 393 Chlorin e6, 4, 404 trimethyl ester, 4, 398 synthesis, 4, 416 Chlorination pyridazines, 3, 20, 21 Chlorine trifluoride bonding, 1, 564 Chlorin-phlorin, 4, 398 Chlorins, 4, 378 absorption spectra, 4, 389 formation, 4, 394 molecular structure, 4, 385 oxidation, 4, 395 Chlorisondamine chloride as hypertensive agent, 1, 176 Chlormethiazoles metabolism, 1, 235 Chlormethiuron against ectoparasites veterinary use, 1, 217 Chlormezanone as antidepressant, 1, 169 Chlorocruoroheme, 4, 380 Chlorofucin conformation, 7, 703 Chloronium iodide, biphenylene-reactions, 1, 566... 

Reducing porphycene in the presence of alcoholic sodium metal gives rise to a different reduction product. Under these conditions, it was found, for instance, that the unsubstituted porphycene 3.2 affords the 9,10-dihydroporphycene 3.93 (Scheme 3.1.17) instead of an jV,iV-dihydro- or 2,3-dihydroporphycenes, such as 3.36 and 3.90 (afforded by the H2/Pd-C reduction process discussed above). A species such as 3.93 thus bears a structural analogy to the phlorins of the porphyrin series. Unfortunately, structural information for this class of molecules, including 3.93, is currently lacking. 

Chemical oxidation of Fe111 porphyrins with bromosuccinimide leads to irreversible formation of an addition product of unknown structure with a phlorin-type spectrum [Fuhrhop (75)], whereas the related electrochemical oxidation yields one-electron oxidation products, with a Ti-cation-radical spectrum [Felton (61)]. The latter products have been discussed in IV.6. Oxidation of Ru11 porphyrin carbon monoxide adducts also yields stable Tt-cation radicals [Brown (18)]. 

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