Morpholinium 2,4-dinitrophenolate aqua salt and ethylenediammonium 2,4-dinitrophenolate aqua salt

被引:32
|
作者
Lazzarotto, Marcio
Castellano, Eduardo Ernesto
Nachtigall, Francine Furtado
机构
[1] Univ Fed Rio Grande do Sul, Dept Quim Organ, BR-9500 Porto Alegre, RS, Brazil
[2] Univ Sao Paulo, Dept Fis, BR-13566 Sao Carlos, SP, Brazil
关键词
2,4-dinitrophenol; ammonium salts; morpholine; ethylenediamine; X-ray diffraction;
D O I
10.1007/s10870-007-9235-4
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
The structures of the aqua salts of 2,4-dinitrophenolate ( 2,4-DNP-) with ethylenediammonium ( EDA(2+)) and morpholinium ( MP+) have been determined by X-ray diffraction, the first with 2: 1 stoichiometry. The EDA2+ salt crystallizes in P2(1)/c space group, with a = 5.887; b = 23.441; c = 7.075, beta = 96.61, R1 = 0.0365 for reflections with Fo > 4sig( Fo). MP+ salt crystallizes as P-1 space group; a = 6.655; b = 9.388 c = 11.452; alpha = 104.82 beta = 102.31 gamma = 105.24, with R-1 = 0.0334. Phenolates and ammonium groups interact through hydrogen bonds and the N+center dot center dot center dot O distances for MP+ and EDA(2+) salts are 2.783 angstrom and 2.812 angstrom, respectively. There is one water molecule by asymmetric unit, interacting with phenolate and ammonium ions. The arrays of hydrogen bonds are cyclic, with six and four members alternated and the position of the units is dependent on the ability to form hydrogen bonds. The Job's plot for ethylenediamine and 2,4 dinitrophenol shows the same 2: 1 stoichiometry in ethanol for EDA(2+)-2,4-DNP- salt.
引用
收藏
页码:699 / 705
页数:7
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