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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A 23-Membered NO4S2-Macrocycle and Its Soft Metal Complexes Involving Tetramercury(II) Bis(macrocycle) Species as Kinetic and Thermodynamic Products

2018년 2월 7일 14시 48분 55초
INOR.P-165 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Mingyeong Shin, Huiyeong Ju, Shim Sung Lee*
Department of Chemistry, Gyeongsang National University, Korea

A ditopic 23-membered NO4S2-macrocycle (L) incorporating a rigid and a flexible binding sites was synthesized and its silver(I) and mercury(II) complexes exhibiting different stoichiometries and coordination modes were prepared and structurally characterized. First, silver(I) perchlorate reacts with L to afford an endocyclic mononuclear complex [Ag(L)]ClO4 (1) in which the silver(I) ion locates at the rigid binding site of the macrocyclic cavity adopting a penta-coordinated square pyramidal geometry. The 1H-NMR titration results for the silver(I) complexation agree with the solid state data. Interestingly, reaction of L with HgI2 led to the isolation of two tetranuclear bis(macrocycle) complexes, [(exoHgLI2)2(μ-Hg2I4)] (2) and [(endoHgLI2)2(μ-Hg2I4)] (3), as a kinetic and a thermodynamic product, respectively (see below). These two products are configurational isomers which show different coordination modes. In both products, for example, two exocyclic (2) and two endocyclic (3) mercury(II) complex units are linked by tetraiododimercury(II) core, (μ-Hg2I4), to give a 4:2 (metal-to-ligand) stoichiometry. It is profound that the exo- and endo-coordinated macrocyclic complexes (configurational isomers) are isolated and characterized as a kinetic product and a thermodynamic product, respectively.