Halogenations 1,10-phenanthroline, 1-oxide

The substituted tricarbonyl complexes react in a similar fashion to the tetracarbonyl complexes with halogens, whereas electrochemical oxidation appears to cause the formation of a doubly charged cation, [M(CO)3 (triars)]2+, where M = Cr, Mo, W (67). Allyl halides react with the tripyridine-substituted carbonyls of the type Mo(CO)3(bipy)py [or Mo(CO)3 (phen)py phen = phenanthroline] to form a 77-allylic carbonyl cation, such as [Mo(CO),(bipy)py(7r-allyl)]+ (146). The cation reacts with sulfur dioxide to form Mo(CO)2(bipy)(S02)2 (147). 

Halogenation. 1,10-Phenanthroline-lV-oxide was converted to 2-chloro-1,10-phenanthroline by treatment with phosphoryl chloride, sodium chloride, and lYJV-dimethylformamide (eq 2). ... 

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