1.2- diamino-2-methylpropane

In CC14 suspension, chlorine oxidation of [Ni(diamine)3]Cl2 affords unstable orange [Ni(diamine)3]Cl3 (diamine = en, 1,3-propanediamine, 1,2-cyclohexanediamine, 1,2-diamino-2-methylpropane, V-methylethanediamine) some of these species are stable for a few weeks in a... 

Although earlier attempts to isolate chromium(II) complexes of various bidentate amines from aqueous solutions produced chromium(III) complexes and hydrogen, the predominantly non-aqueous methods outlined in Scheme 10 provide complexes of ethylenediamine (en), 1,2-diaminopropane (pn), 1,3-diaminopropane (tmd), l,2-diamino-2-methylpropane (dmp), jVjA-dimethylethylenediamine (NNdmn) and N, N -dimethylethylenediamine (NN dmn) (Table 11). In general, ethanol is a suitable solvent but with some amines it is necessary to dehydrate the halide with 2,2-dimethoxypropane (DMP) and dry the ethanol carefully to prevent hydrolysis and oxidation. 

V-Acetylisatin (97) with l,2-diamino-2-methylpropane gave either 3-oacetami-dophenyl-5,5-dimethyl-5,6-dihydro-2(l//)-pyrazinonc (96) (two-stage process as in the foregoing examples 74%) or its 6,6-dimethyl isomer (98) (THF, 5°C, 3 h then 20°C, 1 h 60%) other pairs of isomers were made similarly.1054... 

In 1934 and 1937, Harry D. K. Drew et al. tried to solve the problem by preparing isomers of compound types M(AA)CD and M(AB)CD (see Table 3). For the symmetrical chelate group he chose ethylenediamine and, for the unsymmetrical one, isobutylenediamine (l,2-diamino-2-methylpropane). As... 

Methylpropane-l,2-diamine (l,2-diamino-2-methylpropane) [811-93-8] M 88, h 47-48 /17mm, pKj 6.25 (6.18), pK 9.82 (9.42). Dry the diamine with sodium for 2 days, then distil it from sodium under reduced pressure. [Beilstein 4IV 1306.]... 

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