TI - Synthesis of two New Dinuclear Copper(II) Complexes and ESR Studies ofCopper(II) – Copper(II) Interaction Through  System PT - JOURNAL ARTICLE TA - jsci JN - jsci VO - 18 VI - 58 IP - 58 4099 - http://jsci.khu.ac.ir/article-1-1136-en.html 4100 - http://jsci.khu.ac.ir/article-1-1136-en.pdf SO - jsci 58 AB  - Our main objective is a better understanding of spin spin interaction of dinuclear copper(II) complexes through  system. The synthesis and characterization of two new dinuclear copper(II) complexes, based on the use of large, pyrole-containing macrocycles, the so called “ expanded porphyrins” , [Cu2(macrocycle)]4+ is described. A chloroform solution spectrum of two complexes taken at room temperature and 130135 K gave a classic electron spin resonance (ESR) pattern for both compounds. Both complexes show a triplet state(S = 1), with both M = 1 and M = 2 (half field) transition which is the characteristics of Cu(II) Cu(II) dimer. The observation of M = 2 band strongly suggests the spin spin interaction occurs through  system. All compounds exhibit a typical M = 1 transition with superhyperfine splitting due to the 14N bound to copper. CP - IRAN IN - LG - eng PB - jsci PG - 32 PT - YR - 2004