Abstract

일차원 수소결합형 배위고분자 <TEX>$[Cu^{II}(C_{13}H_{17}N_3OBr)(C_8H_5O_4)]{\cdot}2H_2O.CH_3OH$</TEX>을 합성하여 단결정 X-선 회절 연구로 특성을 규명하였다. 단량체 단위는 사각평면의 중심 <TEX>$Cu^{II}$</TEX>를 갖고 있다. 네개의 배위자리 중 세자리는 <TEX>$N_2O$</TEX>-주개 세트를 갖는 Schiff 염기형 리간드 (4-bromo-2-[(2-piperazin-1-yl-ethylimino)-methyl]-phenol)가 차지하고, 네 번째 자리는 옆에 있는 테레프탈레이트 단위의 산소 원자가 차지한다. 두개의 인접한 중성분자는 분자간 N-H---O 및 O-H---N 수소결합에 의해 연결되어 이합체 쌍을 형성한다. 각 이합체 쌍은 불연속적인 물 및 메탄올 분자에 의해 수소결합으로 다시 연결되어 일차원 초분자 네트워크를 형성한다. The title one-dimensional hydrogen-bonded coordination compound <TEX>$[Cu^{II}(C_{13}H_{17}N_3OBr)(C_8H_5O_4)</TEX><TEX>]</TEX><TEX>{\cdot}2H_2O.CH_3OH$</TEX> has been synthesized and characterized by single crystal X-ray diffraction study. The monomeric unit contains a square-planar <TEX>$Cu^{II}$</TEX> centre. The four coordination sites are occupied by a tridentate anionic Schiff base ligand (4-bromo-2-[(2-piperazin-1-yl-ethylimino)-methyl]-phenol) which furnishes an <TEX>$N_2O$</TEX>-donor set, with the fourth position being occupied by the oxygen atom of an adjacent terephthalate unit. Two adjacent neutral molecules are linked through intermolecular N-H---O and O-H---N hydrogen bonds and generate a dimeric pair. Each dimeric pair is connected with each other via discrete water and methanol molecules by hydrogen bonding to form a one-dimensional supramolecular network.

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