Jung, OS Park, SH Kim, YJ Lee, YA Jang, HG Lee, U 2024-01-21T13:01:14Z 2024-01-21T13:01:14Z 2021-09-05 2001-01-29 0020-1693 https://pubs.kist.re.kr/handle/201004/140769 The reactions of 2,3-bis(2-pyridyl)quinoxaline (bpq) with CoCl2. 6H(2)O, Ag(CH3CN)(4)BF4, and PdCl2(C6H5CN)(2) produce [CoCl2(bpq)](2). 2CHCl(3), [Ag(bpq)CH3CN](2)(BF4)(2). 2CH(3)CN, and [PdCl2(bpq)], respectively. All the products are discrete 1:1 (metal:bpq) adducts, where the chelation mode of the bpq is dependent upon the metal atoms. The structure of [CoCl2(bpq)](2). 2CHCl(3) is a centrosymmetric Cl-bridged four-membered dimer, [Co2Cl2], in which the bpq is bonded to the cobalt(IT) atom in an anisobidentate mode with the nitrogen donors of pyridine and pyrazine rings. For [Ag(bpq)CH3CN](2)(BF4)(2). 2CH(3)CN, each bpq ligand connects two tetrahedral silver(I) ions in a tridentate mode, resulting in a cationic cyclic dimer. The structure of [PdCl2(bpq)] approximates to a molecular rocking chair with an isobidentate bpq through the nitrogen donors of 2-pyridyl rings. The compounds exhibit significant and characteristic relationships between the structures and their thermal properties. For [CoCl2(bpq)](2). 2CHCl(3), the solvate chloroform molecules are safely contained up to 144 degreesC, but drastically evaporate above this temperature. The striking feature of [Ag(bpq)CH3CN](2)(BF4)(2). 2CH(3)CN is that the skeletal cyclic dimer is basically retained after dissociation of the coordinated acetonitriles in the solid state. (C) 2001 Elsevier Science B.V. All rights reserved. English ELSEVIER SCIENCE SA Synthesis, structure, and thermal behavior of discrete Co(II), Ag(I), and Pd(II) complexes with 2,3-bis(2-pyridyl)quinoxaline. Insight into coordination modes Article 10.1016/S0020-1693(00)00346-7 1 INORGANICA CHIMICA ACTA, v.312, no.1-2, pp.93 - 99 INORGANICA CHIMICA ACTA 312 1-2 93 99 scie scopus 000167092700011 2-s2.0-0035966475 Chemistry, Inorganic & Nuclear Chemistry Article 2,3-bis(2-pyridyl)quinoxaline complexes crystal structures thermal properties