868623-13-6Relevant academic research and scientific papers
Tautomerization in naphthalenediimines: A keto-enamine Schiff base macrocycle
Gallant, Amanda J.,Yun, Michael,Sauer, Marc,Yeung, Charles S.,MacLachlan, Mark J.
, p. 4827 - 4830 (2005)
(Chemical Equation Presented) A new [3 + 3] Schiff base macrocycle incorporating naphthalene groups has been prepared. By examination of its properties, X-ray crystallography of model compounds, and calculations, it has been determined that the macrocycle
Self-assembly properties of Salamo-type trinuclear Cu(II) and Co(II) complexes based on the regulation of H+/OHˉ
Dong, Xiu-Yan,Wang, Bao-Jun,Kang, Quan-Peng,Dong, Wen-Kui
, (2018/04/30)
A novel naphthalenediol-based bis(salamo)-type tetraoxime compound (H4L) was designed and synthesized. Two new supramolecular complexes, [Cu3(L)(μ-OAc)2] and [Co3(L)(μ-OAc)2(MeOH)2]·4CHCl3 were synthesized by the reaction of H4L with Cu(II) acetate dihydrate and Co(II) acetate dihydrate, respectively, and were characterized by elemental analyses and X-ray crystallography. In the Cu(II) complex, Cu1 and Cu2 atoms located in the N2O2 sites, and are both penta-coordinated, and Cu3 atom is also penta-coordinated by five oxygen atoms. All the three Cu(II) atoms have geometries of slightly distorted tetragonal pyramid. In the Co(II) complex, Co1 and Co3 atoms located in the N2O2 sites, and are both penta-coordinated with geometries of slightly distorted triangular bipyramid and distorted tetragonal pyramid, respectively, while Co2 atom is hexa-coordinated by six oxygen atoms with a geometry of slightly distorted octahedron. These self-assembling complexes form different dimensional supramolecular structures through inter- and intra-molecular hydrogen bonds. The coordination bond cleavages of the two complexes have occurred upon the addition of the H+, and have reformed again via the neutralization effect of the OH?. The changes of the two complexes response to the H+/OH? have observed in the UV–Vis and 1H NMR spectra.
Naphthalenediol-based bis(Salamo)-type homo- and heterotrinuclear cobalt(II) complexes: Syntheses, structures and magnetic properties
Zhang, Han,Dong, Wen-Kui,Zhang, Yang,Folaranmi Akogun, Sunday
, p. 279 - 293 (2017/06/19)
Homo- and heterotrinuclear Co(II) complexes with a new acyclic bis(Salamo)-type ligand H4L, which bears a C-shaped O6 site by the metallation of the N2O2 Salamo moieties, were synthesized. The homotrinuclear complex [Co3(L)(OAc)2(CH3OH)2]·2CHCl3 (1) was obtained by the reaction of H4L with 3 equivalents of Co(OAc)2·4H2O. The heterotrinuclear complexes [Co2(L)Ca(OAc)2] (2), [Co2(L)Sr(OAc)2] (3) and [Co2(L)Ba(OAc)2(H2O)]·2CH3CH2OH (4) were acquired by the reaction of H4L with 2 equivalents of Co(OAc)2·4H2O and 1 equivalent of M(OAc)2 (M?=?Ca(II), Sr(II) and Ba(II)). In the crystal structures, the three metal(II) atoms occupy both the N2O2 and O6 sites of the ligand (L)4? moiety. Owing to the different nature of the N2O2 and O6 sites of the ligand H4L, the introduction of two different metal(II) atoms to the site-selective moiety, when compared with complex 1, leads to the replacement of the central Co(II) atom by different alkaline earth metal(II) atoms, namely the Ca(II), Sr(II) and Ba(II) atoms for complexes 2, 3 and 4, respectively. Magnetic measurements were performed on complexes 1–4, where an intramolecular ferromagnetic interaction was found in complex 3 and intramolecular antiferromagnetic interactions were found in complexes 1, 2 and 4. The magnetic susceptibilities above 50?K obey the Curie–Weiss law and their constant values were determined for all the complexes.
Four homo- and hetero-bismetallic 3d/3d-2s complexes constructed from a naphthalenediol-based acyclic bis(salamo)-type tetraoxime ligand
Hao, Jing,Li, Li-Long,Zhang, Jin-Tong,Akogun, Sunday Folaranmi,Wang, Li,Dong, Wen-Kui
, p. 1 - 10 (2017/06/27)
The homo/heterotrinuclear metal(II) complexes [Zn3(L)(OAc)2(CH3OH)2]·3CHCl3 (1), [Zn2(L)Ca(OAc)2]·CHCl3 (2), [Zn2(L)Sr(OAc)2] (3) and [Zn2Ba(L)(OAc)2(CH3OH)]·CH3OH·CHCl3 (4), with a novel acyclic bis(salamo)-type tetraoxime ligand H4L, were synthesized and characterized by elemental analyses, IR, UV–vis and fluorescence spectra. UV–vis titrations clearly show that complexation of H4L with Zn(II) ions affords a stoichiometric ratio of 3:1 (M:L) in a cooperative fashion. Complexes 2, 3 and 4 can acquire by the substitution reactions of complex 1 with 1 equivalent of M(OAc)2 (M2+?=?Ca2+, Sr2+ or Ba2+). The crystal structures of complexes 1–4 have been determined by single-crystal X-ray diffraction. The coordinating ability of the [Zn3(L)]2+ units may be utilized as a cation recognition phenomenon.
Syntheses, structures and catecholase activities of homo- and hetero-trinuclear cobalt(II) complexes constructed from an acyclic naphthalenediol-based bis(Salamo)-type ligand
Li, Li-Hong,Dong, Wen-Kui,Zhang, Yang,Akogun, Sunday Folaranmi,Xu, Li
, (2017/09/30)
A series of homo- and hetero-trinuclear cobalt(II) complexes [Co3(L)(OAc)2(CH3CH2OH)(H2O)] (1), [Co2Ba(L)(OAc)2] (2) and [Co2Ca(L)(OAc)2]·CHCl3 (
Synthesis of "calixarene-like" N,N-ditosyldiaza[3.3](1,4) naphthalenophanes
Tran, Huu-Anh,Collins, Julie,Georghiou, Paris E.
experimental part, p. 1175 - 1182 (2009/02/02)
A series of new tetrahomodiazacalix[2]naphthalenes, containing 2,3-dialkoxy-substituted naphthalene units, have been synthesized and some of their properties are reported. All of the newly-synthesized macrocycles were highly symmetrical and conformational
