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Vol 44, No 11 (2018)
- Year: 2018
- Articles: 10
- URL: https://journals.rcsi.science/1070-3284/issue/view/13334
Article
Chalcogenide Complexes of Cyclopentadienylnickel with Heterocyclic Carbene
Abstract
The monomeric complex (η5-C5H5)Ni(Me2Im)SnPr synthesized by the reaction of the [(η5‑C5H5)Ni(μ-SnPr)]2 dimer with dimethylimidazolium carboxylate is rapidly oxidized in air to form the sulfone complex (η5-C5H5)Ni(Me2Im)S(O)2nPr (I), while its reaction with the adduct W(CO)5(ТHF) affords (η5-C5H5)Ni(Me2Im)(μ-SnPr)W(CO)5 (II). A new heterometallic complex (η5‑C5H5)Ni(Me2Im)TeI2Fc (III) containing the terminal telluroferrocenyl fragment is obtained by the reaction of the known nickel carbene complex (η5-C5H5)Ni(Me2Im)I with FcTeI (Fc = (η5-C5H4)Fe(η5-C5H5)). The complexes synthesized are studied by X-ray structure analysis (CIF files CCDC nos. 1835574, 1835573, and 1835572 for compounds I, II, and III, respectively).
647-652
Replacement of Ligands in a Molecule of Polyhedral Phenylmetallosiloxane Containing Nickel and Sodium Ions
Abstract
The possibility of the partial or complete substitution of the outer-sphere solvate shell of n-butanol molecules by the nitrogen-containing compounds in the phenylnickelsodiumsiloxane complex. The high-symmetry spatially fixed rigidly cationic layer retains its structure. The obtained complexes Na2(μ-H2O)2(n-BuOH)2{[C6H5SiO2]6Ni4Na4(μ3-OH)2[C6H5SiO2]6} · 8(n-BuOH) · 2NH3 (II) and {[C6H5SiO2]6Ni4Na6(μ3-OH)2[C6H5SiO2]6} · 4(μ-C3H7NO) · 6(C3H7NO) · 2.8(H2O) · 0.6(C3H7NO) (III) are studied by X-ray diffraction analysis (CIF files CCDC nos. 1810736 (II) and 1810737 (III)).
653-659
Cyano-Bridged d–f Ensembles of the Dysprosium Tetrapyridine Complexes with the Hexacyanoferrate Anion
Abstract
The reactions of DyX3 · 6H2O (X = NCS, Cl) with 2,2':6',2''-terpyridine (Terpy) and K3Fe(CN)6 in aqueous-alcohol solutions afford cyano-bridged ensembles [Dy(Terpy)(H2O)3Fe(CN)6] · nH2O, [Dy2(Terpy)2(H2O)3(CO3)(NCS)Fe(CN)6] · 4H2O, and [Dy2(Terpy)2(H2O)4(CO3)(NCS)Fe(CN)6] · 11.4H2O. The compounds obtained are identified by the data of elemental analysis, IR spectroscopy, X-ray diffraction analysis, and X-ray structure analysis (CIF files CCDC nos. 1827138–1827140). The study of the magnetic properties of complex [Dy(Terpy)(H2O)3Fe(CN)6] · nH2O shows the low-spin state of Fe3+. The dynamic magnetic behavior of this complex exhibits a slow magnetic relaxation.
660-666
N,N-Bis(2-Hydroxyethyl)taurine: Synthesis, Structure, and Stability of the Complexes with Cobalt(II) and Nickel(II)
Abstract
The complex formation of N,N-bis(2-hydroxyethyl)taurine with cobalt(II) and nickel(II) ions is studied. The acidic ionization constant of the ligand is determined by the potentiometric method. The stability constants of the complexes with the metal ions are calculated. Bis(N,N-di(2-hydroxyethyl)taurinato)cobalt(II) (II) and bis(N,N-di(2-hydroxyethyl)taurinato)nickel(II) monohydrate DMF disolvate (I) are synthesized, and their structures are studied by X-ray diffraction analysis (CIF file CCDC no. 1822829 (II)).
667-672
Mononuclear Molybdenum Oxohalide Complexes (Bu4N)[MoOCl4(H2O)] and (Bu4N)[MoOBr4(H2O)]: Synthesis and Crystal Structures
Abstract
The oxidation of K3[MoCl6] with air oxygen in aqueous solutions of HX (X = Cl, Br) in the presence of n-tetrabutylammonium salts affords mononuclear heteroligand complexes (Bu4N)[MoOCl4(H2O)] (I) and (Bu4N)[MoOBr4(H2O)] (II). The complexes are characterized by X-ray diffraction analysis (СIF files CCDC nos. 1812657 (I) and 1812658 (II).
673-677
Syntheses and Characterization of Coordination Compounds of 3d-Metal 5-Sulfosalicylates with Phenylacethydrazide: Crystal Structure of [Ni(L)3]HSSal · 3H2O (L is Phenylacethydrazide, and HSSal2– is 5-Sulfosalicylic Acid Anion)
Abstract
The complexes of 3d-metal 5-sulfosalicylates with phenylacethydrazide are synthesized: [Co(L)3]HSSal · 3H2O (I), [Ni(L)3]HSSal · 3H2O (II), and [Zn(L)3]HSSal · 6H2O (III) (L is phenylacethydrazide, and HSSal2– is 5-sulfosalicylic acid anion). Compounds I–III are characterized by the methods of chemical analysis, IR spectroscopy, diffuse reflectance spectroscopy, luminescence, and thermogravimetry. Compound II is studied by X-ray diffraction analysis (СIF file CCDC no. 1819696). In the complex cation [Ni(L)3]2+, the nickel atom has a face octahedral coordination mode by three O atoms and three N atoms of three bidentate chelate ligands L. The complex cations, HSSal2– anions, and crystallization water molecules are joined by a branched system of hydrogen bonds. Complexes I–III are luminescent, and complex III exhibits the brightest luminescence.
678-687
Synthesis, Crystal Structure of Chiral Ferrocenyl Amino Alcohols, and Its Use for Asymmetric Transfer Hydrogenation
Abstract
Two chiral ferrocenyl amino alcohols (IIIa and IIIb) have been synthesized for the iridium catalyzed asymmetric transfer hydrogenation of aromatic ketones. The structures of two chiral ferrocenyl amino alcohols have been determined by single crystal X-ray diffraction (CIF files CCDC nos. 1056737 (IIIa) and 1056734 (IIIb)). The results show that the activity and enantioselectivity of the chiral iridium catalyst are very sensitive to the substrate structure. Ir(I)-catalyzed asymmetric transfer hydrogenation of acetophenone resulted in moderate to good yield and lower enantioselectivity; asymmetric transfer hydrogenation of proopiophenone and 2-benzoylpyridine resulted in lower yield and lower enantioselectivity; as for 4-benzoylpyridine, good results have been achieved.
688-692
Magnetism and Structure of a 3D Uncommon Pentanuclearcopper(II) Coordination Polymer
Abstract
A 3D coordination polymer, [Na3KCu5(Tar)2(HTar)2(H2O)7] (I) (H2Tar = tartaric acid), was synthesized by the reaction of potassium sodium tartrate and Cu(NO3)2 and characterized by X-ray single crystal diffraction (СIF file CCDC no. 1575976). Complex I is built up in a shell-like manner based on inner two symmetry-related pentanuclear copper cores, the cores are surrounded by coordinated synchronously Na and K atoms, which shapes into 3D nanoporous architecture. Additionally, I exhibits antiferromagnetic behavior.
693-700
Synthesis, Crystal Structures and Insulin-Enhancing Activity of Vanadium(V) Complexes with Hydrazone Ligands
Abstract
Two new isostructurally mononuclear vanadium(V) complexes, [VO(L1)(OMe)(MeOH)] (I) and [VO(L2)(OMe)(MeOH)] (II), where L1 and L2 are the dianionic form of 2-chloro-N'-(3,5-dibromo-2-hydroxybenzylidene)benzohydrazide and 2-bromo-N'-(3,5-dibromo-2-hydroxybenzylidene)benzohydrazide, respectively, have been prepared. The complexes have been characterized by physico-chemical methods and single crystal X-ray determination (CIF files CCDC nos. 1824513 (I) and 1824514 (II)). The V atoms in both complexes are coordinated by the three donor atoms of the hydrazone ligands, two O atoms from one deprotonated methanol ligand and one neutral methanol ligand, and one oxo group, forming octahedral coordination. Insulin-mimetic tests on C2C12 muscle cells using biovision glucose assay indicates that the complexes significantly stimulated cell glucose utilization with cytotoxicity at 0.15 g L–1.
701-706
Erratum
707-707