Korkmaz, S. Aslan; Karadag, A.; Korkmaz, N.; Andaç, O.; Gürbüz, N.; Özdemir, I.; Topkaya, R.

Five cyanide complexes, [Ni(N-bishydeten)Pd(CN)(4)] (1), [Cu(N-bishydeten)Pd(-CN)(2)(CN)(2)](n) (2), [Cu(N-bishydeten)(2)][Pd(CN)(4)] (3), [Zn(N-bishydeten)Pd(CN)(4)] (4), and [Cd(N-bishydeten)(2)][Pd(CN)(4)] (5) (N-bishydeten = N,N-bis(2-hydroxyethyl)-ethylenediamine), have been synthesized and characterized using various techniques. Different structures were formed when the M:L ratio was varied in copper complexes. The single-crystal X-ray diffraction analysis reveals that 2, a 1-D cyanide-bridged complex with 2,2-CT-type zigzag chain, was obtained by using 1:1M:L ratio whereas 3 was formed as a complex salt in a molar ratio of 1:2. The thermal stabilities determined from DTG(max) values of the first decomposition stages change in the order 1>5>4>3>2. Although an EPR signal was not observed for 1, the g parameters obtained from the EPR spectra of 2 and 3 indicate that Cu-II ions are located in tetragonally distorted octahedral sites (D-4h), and the ground state of the unpaired electron is (B-2(1g)). The magnetic behavior indicates a very small antiferromagnetic interaction below 10K for 1-3. In 3, there is a temperature-independent paramagnetism () due to the orbital moments of the d electrons. 1-3 were tested as catalysts in Suzuki and Heck coupling reactions.

AtıfWoS16·OpenAlex15

İncele

Karadag, A.; Korkmaz, S. Aslan; Andaç, O.; Yerli, Y.; Topcu, Y.

Four cyano complexes, [Ni(N-bishydeten)Ni(CN)(4)](n) (c1), [Cu(N-bishydeten)(2)][Ni(CN)(4)] (c2), [Zn-2(N-bishydeten)(2)Ni(CN)(4)](n) (c3), and [Cd(N-bishydeten)(2)][Ni(CN)(4)] (c4), have been synthesized and characterized by FT-IR, elemental, and thermal analyses. The structures of c2 and c4 were determined by single-crystal X-ray diffraction studies; both structures contain isolated cations and anions. The c2 consists of [Cu(N-bishydeten)(2)](2+) with octahedrally coordinated Cu-II and diamagnetic [Ni(CN)(4)](2-), but c4 consists of [Cd(N-bishydeten)(2)](2+), in which Cd-II is eight coordinate with two tetradentate N-bishydeten and diamagnetic [Ni(CN)(4)](2-). The value of the shape measure S (degrees) indicates that the coordination geometry around Cd-II lies along D-2d [dodecahedron; (dd)], C-2v [bicapped trigonal prism; (btp)], and D-4d [square antiprism; (sap)] but close to D-2d and D-4d. Variable temperature magnetic susceptibility measurements of c1 and c2 show the presence of little antiferromagnetic interaction below 20 K. Thermal analyses reveal that first neutral N-bishydeten and then cyano ligands were liberated from the complexes.

AtıfWoS19·OpenAlex16

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