1,4-Dinitro, 2,5-dibromobenzene

Dinitro-3,4-dibromobenzeije, greenish crysts (from CS2), mp 109° d 2.375 obtd with other isomers by nitrating l-nitro-2,3-dibromobenzene with mixed acids (Ref 1)... [Pg.85]

Dinitro-3,3-dibromobenzene, mp 84.8-86°, trimorphic stable form, monoclinic prisms (from coned so In of eth-alc or ale, d 2.274 metastable form, monoclinic prisms (from cooling a saturated soln in eth acet), d 2.317 and labile form, rhmb bipyramidal crysts (from seeding an alc-eth soln) prepd by nitrating l-nitro-3,5-dibromobenzene with mixed acid... [Pg.85]

Dinitro-3,6-dibromobenzene, monoclinic prisms (from CS2 or glac acet ac), mp 159-60° readily sol in hot abs ale insol in w prepd by nitrating p-dibromobenzene with mixed acid, but a p-dibromo-dinitrobenzene isomer... [Pg.85]

Dinitro-4.3-dibromobenzene, rhmb ndls (from glac acet ac) or crysts (from CS2), readily sublimes by heating on a w bath, mp 114-15° d 2.313 mod sol in eth, chlf CS2 diffc sol in cold ale, petr eth glac acet ac obtd by warming o-dibromobenzene or 1-nitro-3,4-dibromobenzene with mixed acid (Ref 1)... [Pg.85]

Dinitro-2,4-dibromobenzene, almost col ndls or yellowish-grn pits (from ale), mp 83° prepd by nitrating either m-dibromobenzene or l-nitro-2,6-dibromobenzene (Ref 3)... [Pg.85]

Dinitro-4,5-dibromobenzene, monoclinic prisms (from CS2)t mp 71°, d 2.373 readily sol in ale glac acet ac obtd with other... [Pg.85]

Dinitro 4,6-dibromobenzene, mp 117° yel dimorph stable form, rhmb crysts, d 2.295 sol in common solvs and mecastable form, monoclinic prisms (from a cooled saturated in eth + a little ale or by seeding a saturated soln in eth acet) prepd by nitrating m-dibromobenzene or l-nitro-2,4-dibromo-benzene with mixed acid (Ref 5)... [Pg.86]

Dinitro-2,3-dibromobenzene, monoclinic prisms (from C 2), mp 156.5° diffc sol in ale 8c eth si sol in CS2 obtd with other isomers by heating l-nitro-2,3-dibromoben-zene with mixed acid at 100°(Ref 4)... [Pg.86]

Dinitro-2.3-dibromobenzene, pale-yel jirisms (from ale or benz + ale), mp 126 27° sol in benz, chlf 8c CS2 si sol in eth 8c cold ale insol in w petr eth obtd with other isomers by nitrating p-dibromobenzene (Ref 6)... [Pg.86]

Dinitro-2.6-dibromobenzene, prisms (from ale), mp 130° prepd from 4-nitro-2,6-dibromo-benzenediazonium nitrate NaN02 soln at 0°(Ref 7)... [Pg.86]

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