resumo
Two copper azido complexes [Cu4(L1)4(mu 1,1-N3)3(N3)] (1) and [{Cu2(L2)(N-benzylen)(mu 1,1-N3)3(mu 1,1,3-N3(N3)]n (2) have been synthesized by the reaction of aqueous solution of sodium azide to a methanolic solution of copper perchlorate hexahydrate and corresponding Schiff-base ligands. Schiff bases HL1 and HL2 act as blocking coligands are derived from the 1:1 condensation of N-benzyl ethylenediamine with Salicyldehyde and 2-hydroxy-5chloroacetophenone respectively (N-benzylen is the N-benzyl ethylenediamine). These two complexes are characterized by the elemental analysis, FT-IR, single crystal X-ray diffraction, powder XRD and also TGA. Single crystal X-ray structural study reveals that complex 1 is the only single mu 1,1- azido bridged chain tetramer to the best of our knowledge and complex 2 is a mixed ligand azido bridged one dimensional chain which also represents the unique example containing three types of azido bonding modes mu 1,1-N3, mu 1,1,3-N3 and terminal N3 present simultaneously. Magnetic susceptibility measurements between 4.5 K and 300 K showed that complex 1 and complex 2 are antiferromagnetic and ferromagnetic in nature, respectively.
palavras-chave
BRIDGED BINUCLEAR COPPER(II); 1D COORDINATION POLYMER; CRYSTAL-STRUCTURES; AZIDO LIGAND; SCHIFF-BASE; COMPLEXES; NUCLEARITY; PSEUDOHALIDES; DICYANAMIDE; COMPOUND
categoria
Chemistry
autores
Ghosh, M; Chakrabarty, PP; Jana, AD; Schollmeyer, D; Sakiyama, H; Mikuriya, M; Debnath, R; Brandao, P; Mal, D; Saha, S
nossos autores
Paula Cristina Ferreira da Silva Brandão
Investigador Auxiliaragradecimentos
S. S. thankfully acknowledges UGC [Sanction no.F.38-5/2009 (SR) ] and DST [Sanction no. SR/FT/CS-060/2009] , New Delhi for financial support of the total work done in the Department of Chemistry, Acharya Prafulla Chandra College. S. S. also acknowledges DST-FIST for funding of Instruments. We are grateful to Dr. Subhoday Dasgupta, Associate Professor, Department of English, Acharya Prafulla Chandra College for his valuable suggestions in the preparation of the manuscript.