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N-(β-巯基乙基)乙二胺-N,N′,N′-三乙酸(Ⅳ)及N-(β-氨基乙基)乙二胺-N,N′,N′-三乙酸(Ⅴ)业已合成。前者形成銻螯合物,后者不与亚銻酸作用。丙二胺四乙酸(Ⅱ,n=3)锑螯合物的稳定度较EDTA-Sb为弱,故在烷撑二胺四乙酸中,次甲基数(n)超过3时,锑螯合物难以形成,而由2增至3时,二氮原子与锑配位的能力则大为降低。一系列具较大分子的烷基硫醚取代的乙二胺三乙酸(Ⅵ)及其锑螯合物亦已制备。在此类锑螯合物中,硫原子不参与螯合。
N- (β-mercaptoethyl) ethylenediamine-N, N ’, N’-triacetic acid (IV) and N- (β-aminoethyl) ethylenediamine- N, N’, N’-triacetic acid (V) has been synthesized. The former forms antimony chelates, the latter does not interact with antimonous acid. Propylenediaminetetraacetic acid (Ⅱ, n = 3) antimony chelate stability than EDTA-Sb is weak, so in the alkylenediaminetetraacetic acid, methine number (n) exceeds 3, antimony chelation Difficult to form things, and from 2 to 3, the ability of the two nitrogen atoms and antimony coordination greatly reduced. A series of alkyl sulfide-substituted ethylenediaminetriacetic acid (VI) with larger molecules and their antimony chelates have also been prepared. In such antimony chelates, sulfur atoms are not involved in chelation.