Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
908 4 |
Ultima descărcare din IBN: 2021-11-09 08:49 |
Căutarea după subiecte similare conform CZU |
548.7 (30) |
Кристаллография (51) |
SM ISO690:2012 MIKURIYA, Masahiro, HAMAGAWA, Mayu, TOMIOKA, Natsuki, YOSHIOKA, Daisuke, UEHARA, Naoko, FUJIMORI, Rikai, YAMAMOTO, Hiroki, ANDO, Yoshinari, HORI, Shoichi, KURIYAMA, Taro, MITSUHASHI, Ryoji, HANDA, Makoto. Synthesis, crystal structure, and properties of copper(II) complexes with 1,4,7-tris(2-aminoethyl)-1,4,7-triazacyclononane. In: Chemistry Journal of Moldova, 2015, nr. 2(10), pp. 40-47. ISSN 1857-1727. DOI: https://doi.org/10.19261/cjm.2015.10(2).04 |
EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
Chemistry Journal of Moldova | |||||
Numărul 2(10) / 2015 / ISSN 1857-1727 /ISSNe 2345-1688 | |||||
|
|||||
DOI: https://doi.org/10.19261/cjm.2015.10(2).04 | |||||
CZU: 548.7 | |||||
Pag. 40-47 | |||||
|
|||||
Descarcă PDF | |||||
Rezumat | |||||
Three kinds of copper(II) complexes with 1,4,7-tris(2-aminoethyl)-1,4,7-triazacyclononane (taetacn), [Cu(taetacn)](ClO4)2 (1), [Cu(Htaetacn)](ClO4)3 (2), and [Cu(Htaetacn)](BF4)3 (3) were synthesized and characterized by elemental analyses, IR and UV-Vis spectroscopies. The spectral features are in harmony with an octahedral geometry for 1 and a square-pyramidal coordination for 2 and 3. The crystal structure of 2 was determined by the single-crystal X-ray diffraction method at 293 K. It crystallizes in the orthorhombic space group Pnma with a = 20.605(3) Å, b = 12.7944(18) Å, c = 9.8972(14) Å, V = 2609.2(6) Å3, Dx = 1.582 g/cm3, and Z = 4. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0723 and 0.2389, respectively, for all 3253 independent reflections. The compound consists of squarepyramidal copper(II) cation with protonated Htaetacn and tetrahedral ClO4 – anions. The temperature dependence of magnetic susceptibilities obeyed the Curie-Weiss law with Ɵ = –2.4, –5.2 and –7.2 K for 1, 2, and 3, respectively. Cyclic voltammetry of 2 in DMF showed two quasi-reversible reduction waves (Epc = –0.98, Epc = –0.92; Epc = –1.30, Epc = –1.22 V versus Fc/Fc ). |
|||||
Cuvinte-cheie copper(II) complex, magnetic properties, 1, macrocyclic ligand, 7-triazacyclononane, 4 |
|||||
|