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|Title: ||Synthesis and complexation studies of 16-membered [1+1] selenaaza- and some related macrocycles|
|Authors: ||CHAKRABORTY, T|
|Keywords: ||selenium coronands|
|Issue Date: ||2010|
|Publisher: ||ELSEVIER SCIENCE SA|
|Citation: ||INORGANICA CHIMICA ACTA, 363(12), 2905-2911|
|Abstract: ||novel 16-membered [1+1] unsymmetrical selenaaza Schiff base macrocycle, 8,9,10,11-tetrahydo-7H-dibenzo-[d,o][1,3,7,10,13]diselenatriazacyclohexadecine (5) with N(3)Se(2) donor set, has been synthesized by cyclocondensation of di(o-formylphenylseleno)methane and diethylenetriamine. Reduction of 5 with NaBH(4) afforded 6,7,8,9,10,11,12,13-octahydro-5H-dibenzo-[d,o][1,3,7,10,13] diselenatriazacyclohexadecine (6). Macrocycle, 10,11,12,13,14,15,16,26,27,28,29,30,31,32-tetradecahydrotetrabenzo[b,k,n,w][1,13, 5,9,17,21]diselenatetraazacyclotetracosine (2b) was synthesized similarly from di(o-formylphenyl)selenide and 1,3-diaminopropane followed by reduction with NaBH4. Single crystal X-ray structures of 5 and 2b have been determined. Attempted complexation reactions of 5 with Zn(II), Cd(II), Hg(II), Pd(II) and Cu(II) ions and those of 6 with Ag(I), Hg(II) and Pd(II) ions are reported. 28-Membered selenaaza macrocycle 2c on reaction with HgCl(2) and NH(4)PF(6), provided a dinuclear Hg(II) complex 9. Complex 9 has been characterized by single crystal X-ray structure. (C) 2010 Elsevier B. V. .|
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