کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1342885 979949 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation of neutral complexes of boric acid with 1,3-diols in organic solvents and in aqueous solution
ترجمه فارسی عنوان
تشکیل کمپلگس های خنثی اسید بوریک با 1،3-diols در حلال های آلی و در محلول آبی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
چکیده انگلیسی

From solubility measurements in organic media and extraction experiments, the values of the stability constants of neutral 1 : 1 complexes (HBL) formed between boric acid (HB) and 1,3-diols (L) have been obtained in aqueous solution (Kc(w)) and in organic solvents (Kc(s)). The values of the partition coefficients of the diols (PL) and the complexes (PHBL) between water and the organic solvents have also been calculated. Generally, the addition of a diol to an aqueous solution of borax is accompanied by a decrease of pH due to the prevailing formation of borate species but, in the case of 2-methyl-2,4-pentanediol, the pH increased, in agreement with the formation of a single neutral complex. It is shown that a modification of a previous potentiometric procedure yields simultaneously the values of the stability constants of the neutral and anionic complexes in aqueous solution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 14, Issues 13–14, July 1995, Pages 2009-2017