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(VI) was prepared by reacting equimolar portions of l,l0-phenanthroline hydrate and bromoacetaldehyde 2,4-dinitrophenyl-hydrazoner z in benzene soln at 60¡ã for 1 hr with vigorous agitation. The yellow salt, m.p. 196-200¡± (with dec), yield =92%, which precipitated was collected after 3 days and was used in the next stage of the synthesis without further purification. It was difficult to crystallize but an analytical sample of the monohydrate was obtained from aqueous MeOH as yellow crystals, m.p. 205-208¡± (with dec).
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